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Best Selling Genuine Saturn Heater Cores

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We stock Heater Core parts for most Saturn models, including SC2, SL1, SL2, Vue.

Spectra
2001 Saturn L200 HVAC Heater Core Spectra

P311-525F8DF    99292  New

HT2177C , 91167 , 99292 , 92167 , HT2177 , 8336 , 98986 , HTR010467 , 9010449 , 22728343

Qty:
$71.77
Spectra HVAC Heater Core
  • HVAC Heater Core
  • Product Attributes:
    • California_Prop 65 Message:
      • May Cause Cancer Or Reproductive Harm
      • Y
  • Innovative engineering, manufacturing technology and quality control ensure that Spectra Premium HVAC heater cores meet or exceed the performance of the original equipment they replace.
Brand: Spectra
Additional Fitment Information:
Vehicle
2001 - Saturn L200
Spectra
2006 Saturn Vue HVAC Heater Core Spectra

P311-2BECD1D    99308  New

8307 , 9010521 , 92165 , HT2053 , HTR010552 , 910521 , 399981 , 22729533 , 99308 , HT2053C , 91165

Qty:
$68.91
Spectra HVAC Heater Core
  • HVAC Heater Core
  • Product Attributes:
    • California_Prop 65 Message:
      • May Cause Cancer Or Reproductive Harm
      • Y
  • Innovative engineering, manufacturing technology and quality control ensure that Spectra Premium HVAC heater cores meet or exceed the performance of the original equipment they replace.
Brand: Spectra
Additional Fitment Information:
Vehicle
2006 - Saturn Vue
Spectra
2008 Saturn Aura HVAC Heater Core Spectra

P311-362FDEA    99305  New

92013 , 8072 , 22737140 , 22695365 , 22695363 , 92014 , 8038 , HTR010475 , 99305 , HT399328C , 1811600 , HT399328 , 399328 , 9010453 , 91014 , 98994 , 91013

Qty:
$43.92
Spectra HVAC Heater Core
  • HVAC Heater Core
  • Product Attributes:
    • California_Prop 65 Message:
      • May Cause Cancer Or Reproductive Harm
      • Y
  • Innovative engineering, manufacturing technology and quality control ensure that Spectra Premium HVAC heater cores meet or exceed the performance of the original equipment they replace.
Brand: Spectra
Additional Fitment Information:
Vehicle
2008 - Saturn Aura
Spectra
2007 Saturn Ion HVAC Heater Core Spectra

P311-5EDED26    99304  New

91018 , HT2016C , 99304 , HTR010474 , HT2016 , 1811708 , 99020 , 52493347 , 9010462 , 8418 , 92018 , 1563093 , 399917 , 15-63093

Qty:
$59.47
Spectra HVAC Heater Core
  • HVAC Heater Core
  • Product Attributes:
    • California_Prop 65 Message:
      • May Cause Cancer Or Reproductive Harm
      • Y
  • Innovative engineering, manufacturing technology and quality control ensure that Spectra Premium HVAC heater cores meet or exceed the performance of the original equipment they replace.
Brand: Spectra
Additional Fitment Information:
Vehicle
2007 - Saturn Ion
Spectra
2007 Saturn Relay HVAC Heater Core - Rear Spectra

P311-2DF42E0    99265  New

92005 , 98977 , 99265 , HT2111C , 399978 , 9010509 , 92007 , HTR010545 , HT2111 , 8067 , 91004 , 92004 , 91005 , 10328330

Qty:
$54.61
Spectra HVAC Heater Core  Rear
  • HVAC Heater Core
  • Product Attributes:
    • California_Prop 65 Message:
      • May Cause Cancer Or Reproductive Harm
      • Y
  • Innovative engineering, manufacturing technology and quality control ensure that Spectra Premium HVAC heater cores meet or exceed the performance of the original equipment they replace.
Brand: Spectra
Position: Rear
Additional Fitment Information:
Vehicle Position
2007 - Saturn Relay Rear
Spectra
2010 Saturn Outlook HVAC Heater Core - Front Spectra

P311-0974568    99378  New

399420 , 25786439 , HTR010645 , 20829256 , HT2119C , 8551 , 20843382 , 92012 , 9010559 , 68079484AA , 22782131 , 22961456 , 99378 , 910559

Qty:
$69.20
Spectra HVAC Heater Core  Front
  • HVAC Heater Core
  • Product Attributes:
    • California_Prop 65 Message:
      • May Cause Cancer Or Reproductive Harm
      • Y
  • Innovative engineering, manufacturing technology and quality control ensure that Spectra Premium HVAC heater cores meet or exceed the performance of the original equipment they replace.
Brand: Spectra
Position: Front
Additional Fitment Information:
Vehicle Position
2010 - Saturn Outlook Front
TYC Products
1994 Saturn SL HVAC Heater Core - Front TYC Products

P311-4D32603    96030  New

9010243 , GM8285 , 94756 , 398292 , 21030334

Qty:
$38.51
TYC Products HVAC Heater Core  Front
  • TYC HVAC Heater Core
  • ; Core Height (IN): 6.13 Core Length (IN): 8.19 Core Material: Aluminum Core Thickness (IN): 1.02 Inlet Connection Type: Hose Clamp Inlet Diameter (IN): 0.63 Outlet Connection Type: Hose Clamp Outlet Diameter (IN): 0.75
  • Product Attributes:
    • Bottom Header: 1.8x6.83
    • Core Material: Aluminum
    • Inlet Connection Type: Hose Clamp
    • Outlet Connection Type: Hose Clamp
    • Top Header: 1.8x6.83
Brand: TYC Products
Position: Front
Additional Fitment Information:
Vehicle Position
1994 - Saturn SL Front
TYC Products
2004 Saturn Ion HVAC Heater Core - Front TYC Products

P311-50C2B76    96061  New

399917 , HC10006 , 52493347 , 15-63093 , 9010462 , 96061

Qty:
$41.01
TYC Products HVAC Heater Core  Front
  • TYC HVAC Heater Core
  • ; Core Height (IN): 6.13 Core Length (IN): 8.19 Core Material: Aluminum Core Thickness (IN): 1.02 Inlet Connection Type: Hose Clamp Inlet Diameter (IN): 0.63 Outlet Connection Type: Hose Clamp Outlet Diameter (IN): 0.75
  • Product Attributes:
    • Bottom Header: 1.8x6.83
    • Core Material: Aluminum
    • Inlet Connection Type: Hose Clamp
    • Outlet Connection Type: Hose Clamp
    • Top Header: 1.8x6.83
Brand: TYC Products
Position: Front
Additional Fitment Information:
Vehicle Position
2004 - Saturn Ion Front
APDI
2002 Saturn SC1 HVAC Heater Core APDI - Heater Core

P311-361A95E    9010243  New

398292 , 90654 , 21030334 , 98756 , 42893756 , 96030 , 94756 , 8334

Qty:
$47.45
APDI HVAC Heater Core
  • HVAC HEATER CORE
  • Heater Core
  • Product Attributes:
    • Construction: Aluminum
    • Core Depth (in): 1
    • Core Height (in): 8-1/4
    • Core Width (in): 6-3/4
    • Inlet Connection (in): 5/8
    • Outlet Connection (in): 3/4
  • Heater - Saturn
Brand: APDI
Additional Fitment Information:
Vehicle
2002 - Saturn SC1
APDI
2006 Saturn Relay HVAC Heater Core - Front APDI - Heater Core

P311-503BA0B    9010405  New

15925712 , 99225 , 10428823 , 42891007 , 98977 , 399225 , 15211569

Qty:
$52.96
APDI HVAC Heater Core  Front
  • HVAC HEATER CORE
  • Heater Core
  • Product Attributes:
    • Construction: Aluminum
    • Core Depth (in): 1-1/4
    • Core Height (in): 10
    • Core Width (in): 5-1/4
    • Inlet Connection (in): 3/4
    • Outlet Connection (in): 5/8
  • Heater - GM
Brand: APDI
Position: Front
Additional Fitment Information:
Vehicle Position
2006 - Saturn Relay Front
APDI
2007 Saturn Aura HVAC Heater Core APDI - Heater Core

P311-1AD04DC    9010453  New

22737140 , 99305 , 399328 , 42891013 , 22695363

Qty:
$47.80
APDI HVAC Heater Core
  • HVAC HEATER CORE
  • Heater Core
  • Product Attributes:
    • Construction: Aluminum
    • Core Depth (in): 1
    • Core Height (in): 7-3/8
    • Core Width (in): 7-1/4
    • Inlet Connection (in): 5/8
    • Outlet Connection (in): 3/4
  • Heater - GM
Brand: APDI
Additional Fitment Information:
Vehicle
2007 - Saturn Aura
APDI
2006 Saturn Vue HVAC Heater Core APDI - Heater Core

P311-5BB4093    9010521  New

22729533 , 42891165 , 99308

Qty:
$74.65
APDI HVAC Heater Core
  • HVAC Heater Core
  • Heater Core
  • Product Attributes:
    • Construction: Aluminum
    • Core Depth (in): 1-3/4
    • Core Height (in): 9-3/8
    • Core Width (in): 6
    • Inlet Connection (in): 3/4
    • Outlet Connection (in): 3/4
  • Heater - Saturn
Brand: APDI
Additional Fitment Information:
Vehicle
2006 - Saturn Vue
APDI
2007 Saturn Relay HVAC Heater Core - Rear APDI - Heater Core

P311-2DD6429    9010509  New

10362445 , 99265

Qty:
$48.09
APDI HVAC Heater Core  Rear
  • HVAC Heater Core
  • Heater Core
  • Product Attributes:
    • Construction: Aluminum
    • Core Depth (in): 1
    • Core Height (in): 4-5/8
    • Core Width (in): 5-1/2
    • Inlet Connection (in): 3/4 Quick Connect
    • Outlet Connection (in): 5/8 Quick Connect
  • Heater Core - GM
Brand: APDI
Position: Rear
Additional Fitment Information:
Vehicle Position
2007 - Saturn Relay Rear
APDI
2007 Saturn Outlook HVAC Heater Core - Front APDI - Heater Core

P311-2B1953B    9010559  New

20829256 , 99378 , 68079484AA , 22961456

Qty:
$70.78
APDI HVAC Heater Core  Front
  • HVAC Heater Core
  • ; Comments: Kit Included
  • Heater Core
  • Product Attributes:
    • Comments: Kit Included
    • Construction: Aluminum
    • Core Depth (in): 1
    • Core Height (in): 9-7/8
    • Core Width (in): 7-3/8
    • Inlet Connection (in): Oring
    • Outlet Connection (in): Oring
  • Heater Core - GM
Brand: APDI
Position: Front
Additional Fitment Information:
Vehicle Position
2007 - Saturn Outlook Front
APDI
2000 Saturn LW2 HVAC Heater Core APDI - Heater Core

P311-5E9B7D3    9010650  New

90585608 , 99292 , 399292 , 22728343

Qty:
$65.78
  • HVAC Heater Core
  • ; Comments: Kit Included
  • Heater Core
  • Product Attributes:
    • Comments: Kit Included
    • Construction: Aluminum
    • Core Depth (in): 1-1/4
    • Core Height (in): 7-3/4
    • Core Width (in): 6-1/2
    • Inlet Connection (in): Oring
    • Outlet Connection (in): Oring
  • Heater - GM
Brand: APDI
Additional Fitment Information:
Vehicle
2000 - Saturn LW2
Spectra Premium
2001 Saturn LW200 HVAC Heater Core Spectra Premium

P311-45DD417    W0133-1698050  New

Qty:
$140.79
Spectra Premium HVAC Heater Core
Brand: Spectra Premium
Additional Fitment Information:
Vehicle
2001 - Saturn LW200
ACDelco
2002 Saturn LW200 HVAC Heater Core ACDelco

P311-31A8BAA    W0133-1698050  New

Qty:
ACDelco HVAC Heater Core
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
Brand: ACDelco
Additional Fitment Information:
Vehicle
2002 - Saturn LW200
Metrix
2003 Saturn Vue HVAC Heater Core Metrix

P311-21B7306    W0133-1772458  New

Qty:
$119.83
Metrix HVAC Heater Core
Brand: Metrix
Additional Fitment Information:
Vehicle
2003 - Saturn Vue
TYC
2003 Saturn Ion HVAC Heater Core TYC

P311-3A10B7B    W0133-1880202  New

Qty:
$93.77
TYC HVAC Heater Core
Brand: TYC
Additional Fitment Information:
Vehicle
2003 - Saturn Ion
ACDelco
2004 Saturn Ion HVAC Heater Core ACDelco

P311-11285E1    W0133-1880202  New

Qty:
$270.27
ACDelco HVAC Heater Core
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
Brand: ACDelco
Additional Fitment Information:
Vehicle
2004 - Saturn Ion

Latest Saturn Repair and Heater Core Installation Advice

CarJunky AutoAdvice

Partial Solution: 2003 Saturn L200 heater issues

Showing 4 out of 4 Posts
Question From BabsInChgo on Partial Solution: 2003 Saturn L200 heater issues

Hello. I bought my 03 Saturn L200 at from a Saturn dealer with only 2000 dealer miles on it. From Day 1, the heater and AC temperature controls never worked. I took it back repeatedly and dealer kept denying there was a problem. After warranty ran out, they admitted there was a secret TSB about the heater but, of course, then I was not eligible for warranty work. I lived with this problem for years. Three months ago, I took the 79,000-odometer Red beauty to a local Chicago suburb Chevy repair shop to suss out the problem, which of course they found immediately. It needed a new heater core. But....again, after taking it home, the AC and heater never seemed to work the way it should. It still only blew out very hot or very cold and nothing in the middle. Took it back today as they gave me a 1-year warranty. They said it required a software update on the heater core. All I can say is "yea" and good luck to anyone else with a Saturn that has heater/AC issues.

Response From Hammer Time

You bought a 12 year old car with a manufacturer that no longer exists. You didn't expect any problems?

If this is a manual control AC system, then there is no software to even update. The temperature control is operated by a cable. That can be checked for proper operation pretty easily. There's always the possibility that they broke something inside the heater box when they changed the core also.

Response From BabsInChgo Top Rated Answer

My post was specifically directed to those Saturn owners who have heater/AC issues. The HVAC control head and module with calibration may fix the problem. Turns out the service dept forgot to do the mandatory calibration 3 months ago when they was replaced. They did that today; they just called it a software update to cover themselves.

I mentioned I purchased the car new in 2003. It would be quite a challenge to purchase a Saturn from a dealer today. My '03 L200 ran seamlessly for the last 14 years for 77,000 miles.

Response From Hammer Time

I was under the impression that you just bought the car. Apparently you have an auto temp control system as the manual system just uses a cable. Most of those will self calibrate if the battery cable is disconnected.

2001 Saturn LS 3.0 v6 coolant lines mixed up:(

Showing 5 out of 5 Posts
Question From kmleach on 2001 Saturn LS 3.0 v6 coolant lines mixed up:(

I replaced the oilcooler, and head gaskets, 158,000 miles. not sure I got the coolant lines right at the block. hoses from and to heater core, and the coolant fill tank- Its over heating, and boiling back into overflow tank. does the overflow tank connect at one of the two side by side inlets below the crossover housing? and the heater hose on the crossover?

Response From kmleach Top Rated Answer

just getting it all back together- will water as coolant make it overheat? I drove it 15 miles and it was at normal temp- fans running, when I came to stop, in parking lot started overheating. Have stopped and waited for cooldown, added water after it boiled out of overflow tank, ran a bit hot on the way back- ran heater to remove some heat, was hot as i stopped, and boiled out again.

Response From Tom Greenleaf

IMO water only as a quick test isn't the overheat problem. Probably just not full if all else is right. Why did it need this work and what was wrong before you started?
Plenty of variables as you should have sent heads out, inspected all surfaces and put all items back where they were,

T

Response From Discretesignals

Is this your thread?

http://autoforums.carjunky.com/Automotive_Repair_C1/Engine_Fault_Codes_F29/engine_fault_codes_P126059/gforum.cgi?post=122865;t=search_engine#122865

Response From Hammer Time

I doubt it. Different year, different IP, different part of the country.

Coolant Leak! need help.

Showing 2 out of 7 Posts | Show 5 Hidden Posts
Question From arogus on Coolant Leak! need help.

Hey guys,
I have a Saturn L200 and the coolant has been leaking so i decided to look up underneith the car and i find this


https://plus.google.com/photos/111073165020235984436/albums/5687923418539387121

if anyone could give me advice as tho how this happened and or how i can fix it it would be greatly appreciated! thank you!

Response From Hammer Time Top Rated Answer

Looks like you might have some heater core issues. It needs to be pressure tested and checked out further.

Response From Discretesignals

I don't know where you got heater core from in that picture. That is a picture of the radiator and one of the transmission cooler line fittings leaking. If it is coolant, you'll have to replace the radiator.


Response From Hammer Time

Looked like an evaporator connection to the left but it probably was the condenser. I knew I could rely on you to correct me.

Response From Discretesignals

Anytime

Response From Hammer Time


Response From Discretesignals

I love you too.

Heater core 2001 Blazer

Showing 2 out of 6 Posts | Show 4 Hidden Posts
Question From DLTODARO on Heater core 2001 Blazer

Have a 2001 Blazer 4x4 w/ ZR2 package. The issue is heater core,, I paid to have it replaced after purchase in 2005 and again in 2010 by my self and brother in law. What a job. It has again gone out, dont understand why. I did replace radiator, water pump, intake gaskets all this summer so my only guess is debris has somehow damaged it. But the replacements are really junk with there swivel necks and seals. Cant find good ole copper and solder.
Anyways not really up to the 7 hour job it was last time so " Can I access the heater core a different way than removing the whole dash". Even if that means cutting a hole in the top of dash or firewall?

Thanks
Don

Response From Hammer Time

No, you cannot short cut it in any way. You need to flush the system thoroughly and then fill it with Dexcool. I would then test for electrolysis in the coolant with a voltmeter.

Response From Tom Greenleaf

Don - Are you saying this is on its third heater core already? Something is wrong with that scene. Pretty rare to me but I would be checking as HT suggested for some electrolysis problem. Ground things out if additional plain strap ground wires are easy and available.

I don't think this is about what type of antifreeze unless you are using battery acid this is too much. As said it calls for Dexcool which is still just a version of ethylene glycol and IDK why it or any is picking on the heater core?

Make sure hoses to core are correct. It would be a wild maybe that the input hose has too much direct pressure from the water pump. About all use a smaller hose for the in hose or an unseen restrictor in a hose so higher RPMs don't overwhelm the thing,

T

Response From Hammer Time

Dexcool which is still just a version of ethylene glycol and IDK why it or any is picking on the heater core?


Green regular coolant ---------- contains silicates

Dexcool --------------------------- No silicates

Response From DLTODARO

Why dexcool, everything I read steers away from dexcool. It still gets hot just fogging windows and smell. Will a product such as Blue devil seal the leak?

Response From Hammer Time Top Rated Answer

Don't believe everything you read from non-professionals.
DO NOT put sealer in the system or you will be replacing the radiator too.

Read this bulletin


INFORMATION

Bulletin No.: 05-06-02-001A

Date: July 16, 2008

Subject:
Information On Aluminum Heater Core and/or Radiator Replacement

Models:
2005 and Prior GM Passenger Cars and Light Duty Trucks (including Saturn)
2003-2005 HUMMER H2

Supercede:

This bulletin is being revised to update the Warranty Information. Please discard Corporate Bulletin Number 05-06-02-001 (Section 06 - Engine/Propulsion System).

Important:
2004-05 Chevrolet Aveo (Pontiac Wave, Canada Only) does not use DEX-COOL(R). Refer to the flushing procedure explained later in this bulletin.

The following information should be utilized when servicing aluminum heater core and/or radiators on repeat visits. A replacement may be necessary because erosion, corrosion, or insufficient inhibitor levels may cause damage to the heater core, radiator or water pump. A coolant check should be performed whenever a heater core, radiator, or water pump is replaced. The following procedures/ inspections should be done to verify proper coolant effectiveness.

Caution:
To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is hot. The cooling system will release scalding fluid and steam under pressure if the radiator cap or surge tank cap is removed while the engine and radiator are still hot.

Important:
If the vehicle's coolant is low, drained out, or the customer has repeatedly added coolant or water to the system, then the system should be completely flushed using the procedure explained later in this bulletin.

Technician Diagnosis

^ Verify coolant concentration. A 50% coolant/water solution ensures proper freeze and corrosion protection. Inhibitor levels cannot be easily measured in the field, but can be indirectly done by the measurement of coolant concentration. This must be done by using a Refractometer J 23688 (Fahrenheit scale) or J 26568 (centigrade scale), or equivalent, coolant tester. The Refractometer uses a minimal amount of coolant that can be taken from the coolant recovery reservoir, radiator or the engine block. Inexpensive gravity float testers (floating balls) will not completely analyze the coolant concentration fully and should not be used. The concentration levels should be between 50% and 65% coolant concentrate. This mixture will have a freeze point protection of -34 degrees Fahrenheit (-37 degrees Celsius). If the concentration is below 50%, the cooling system must be flushed.

^ Inspect the coolant flow restrictor if the vehicle is equipped with one. Refer to Service Information (SI) and/or the appropriate Service Manual for component location and condition for operation.

^ Verify that no electrolysis is present in the cooling system. This electrolysis test can be performed before or after the system has been repaired. Use a digital voltmeter set to 12 volts. Attach one test lead to the negative battery post and insert the other test lead into the radiator coolant, making sure the lead does not touch the filler neck or core. Any voltage reading over 0.3 volts indicates that stray current is finding its way into the coolant. Electrolysis is often an intermittent condition that occurs when a device or accessory that is mounted to the radiator is energized. This type of current could be caused from a poorly grounded cooling fan or some other accessory and can be verified by watching the volt meter and turning on and off various accessories or engage the starter motor. Before using one of the following flush procedures, the coolant recovery reservoir must be removed, drained, cleaned and reinstalled before refilling the system.

Notice:
^ Using coolant other than DEX‐COOL(R) may cause premature engine, heater core or radiator corrosion. In addition, the engine coolant may require changing sooner, at 30,000 miles (50,000 km) or 24 months, whichever occurs first. Any repairs would not be covered by your warranty. Always use DEX‐COOL(R) (silicate free) coolant in your vehicle.

^ If you use an improper coolant mixture, your engine could overheat and be badly damaged. The repair cost would not be covered by your warranty. Too much water in the mixture can freeze and crack the engine, radiator, heater core and other parts.

Flushing Procedures using DEX-COOL(R)

Important:
The following procedure recommends refilling the system with DEX-COOL(R), P/N 12346290 (in Canada, use P/N 10953464), GM specification 6277M. This coolant is orange in color and has a service interval of 5 years or 240,000 km (150,000 mi). However, when used on vehicles built prior to the introduction of DEX-COOL(R), maintenance intervals will remain the same as specified in the Owner's Manual.

^ If available, use the approved cooling system flush and fill machine (available through the GM Dealer Equipment Program) following the manufacturer's operating instructions.

^ If approved cooling system flush and fill machine is not available, drain the coolant and dispose of properly following the draining procedures in the appropriate Service Manual. Refill the system using clear, drinkable water and run the vehicle until the thermostat opens. Repeat and run the vehicle three (3) times to totally remove the old coolant or until the drained coolant is almost clear. Once the system is completely flushed, refill the cooling system to a 50%-60% concentration with DEX‐COOL(R), P/N 12346290 (in Canada, use P/N 10953464), GM specification 6277M, following the refill procedures in the appropriate Service Manual.

If a Service Manual is not available, fill half the capacity of the system with 100% DEX-COOL(R), P/N 12346290 (in Canada, use P/N 10953464), GM specification 6277M. Then slowly add clear, drinkable water (preferably distilled) to the system until the level of the coolant mixture has reached the base of the radiator neck. Wait two (2) minutes and reverify the coolant level. If necessary, add clean water to restore the coolant to the appropriate level.

Once the system is refilled, reverify the coolant concentration using a Refractometer J 23688 (Fahrenheit scale) or J 26568 (centigrade scale) coolant tester, or equivalent. The concentration levels should be between 50% and 65%.

Coolant dripping below heater core inlet hose

Showing 2 out of 10 Posts | Show 8 Hidden Posts
Question From anavrin on Coolant dripping below heater core inlet hose

First of all, thanks in advance for any help or advice. It is really great there are forums like this to help people, especially when money is tight.

2005
Chevrolet
Equinox
3.4
70,000 miles

I just have a quick question before I start to tear into the dash to replace the heater core. I have the classic symptoms of a heater core leak (coolant smell and thick foggy windows), but don't have any dampness anywhere on the vehicle floor. It is definitely leaking coolant, as I topped it off and it was gone a few days later (I haven't been driving it). I went looking for leaks and noticed there is a consistent drip from something (a valve?) below the heater core inlet hose. See picture below for the location:



Can somebody let me know what that is called? And if possible, what might cause it to be leaking when the engine's not running?

Thank you

Response From Hammer Time

That's the drain for the A/C condensation. Assuming it's cold where you are and that can't be condensation water from the A/C, it would have to be the coolant you have been looking for.

Response From anavrin

Hey Hammer Time,

Thank you for the quick and spot on reply. That definitely gives me more to research. I'm guessing the heater core is leaking and it is somehow coming out the a/c condensation drain. I'll update this post when I've got it figured.

Thanks again.

Response From Hammer Time

Nothing to figure out. It's very common to leak out there with a bad heater core. Where the coolant comes out is determined by the design of the housing and which direction the coolant runs.

Response From Discretesignals

Weird picture... Looks like a brake booster with heater hose connections coming out of it. Must be right hand drive.

Response From Hammer Time

That's the Equinox design. It drains on the driver's side.

Response From Discretesignals Top Rated Answer

Some good info, so you don't have a repeat failure:

INFORMATION

Bulletin No.: 05-06-02-001A

Date: July 16, 2008

Subject:
Information On Aluminum Heater Core and/or Radiator Replacement

Models:
2005 and Prior GM Passenger Cars and Light Duty Trucks (including Saturn)
2003-2005 HUMMER H2

Supercede:

This bulletin is being revised to update the Warranty Information. Please discard Corporate Bulletin Number 05-06-02-001 (Section 06 - Engine/Propulsion System).

Important:
2004-05 Chevrolet Aveo (Pontiac Wave, Canada Only) does not use DEX-COOL(R). Refer to the flushing procedure explained later in this bulletin.

The following information should be utilized when servicing aluminum heater core and/or radiators on repeat visits. A replacement may be necessary because erosion, corrosion, or insufficient inhibitor levels may cause damage to the heater core, radiator or water pump. A coolant check should be performed whenever a heater core, radiator, or water pump is replaced. The following procedures/ inspections should be done to verify proper coolant effectiveness.

Caution:
To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is hot. The cooling system will release scalding fluid and steam under pressure if the radiator cap or surge tank cap is removed while the engine and radiator are still hot.

Important:
If the vehicle's coolant is low, drained out, or the customer has repeatedly added coolant or water to the system, then the system should be completely flushed using the procedure explained later in this bulletin.

Technician Diagnosis

^ Verify coolant concentration. A 50% coolant/water solution ensures proper freeze and corrosion protection. Inhibitor levels cannot be easily measured in the field, but can be indirectly done by the measurement of coolant concentration. This must be done by using a Refractometer J 23688 (Fahrenheit scale) or J 26568 (centigrade scale), or equivalent, coolant tester. The Refractometer uses a minimal amount of coolant that can be taken from the coolant recovery reservoir, radiator or the engine block. Inexpensive gravity float testers (floating balls) will not completely analyze the coolant concentration fully and should not be used. The concentration levels should be between 50% and 65% coolant concentrate. This mixture will have a freeze point protection of -34 degrees Fahrenheit (-37 degrees Celsius). If the concentration is below 50%, the cooling system must be flushed.

^ Inspect the coolant flow restrictor if the vehicle is equipped with one. Refer to Service Information (SI) and/or the appropriate Service Manual for component location and condition for operation.

^ Verify that no electrolysis is present in the cooling system. This electrolysis test can be performed before or after the system has been repaired. Use a digital voltmeter set to 12 volts. Attach one test lead to the negative battery post and insert the other test lead into the radiator coolant, making sure the lead does not touch the filler neck or core. Any voltage reading over 0.3 volts indicates that stray current is finding its way into the coolant. Electrolysis is often an intermittent condition that occurs when a device or accessory that is mounted to the radiator is energized. This type of current could be caused from a poorly grounded cooling fan or some other accessory and can be verified by watching the volt meter and turning on and off various accessories or engage the starter motor. Before using one of the following flush procedures, the coolant recovery reservoir must be removed, drained, cleaned and reinstalled before refilling the system.

Notice:
^ Using coolant other than DEX‐COOL(R) may cause premature engine, heater core or radiator corrosion. In addition, the engine coolant may require changing sooner, at 30,000 miles (50,000 km) or 24 months, whichever occurs first. Any repairs would not be covered by your warranty. Always use DEX‐COOL(R) (silicate free) coolant in your vehicle.

^ If you use an improper coolant mixture, your engine could overheat and be badly damaged. The repair cost would not be covered by your warranty. Too much water in the mixture can freeze and crack the engine, radiator, heater core and other parts.

Flushing Procedures using DEX-COOL(R)

Important:
The following procedure recommends refilling the system with DEX-COOL(R), P/N 12346290 (in Canada, use P/N 10953464), GM specification 6277M. This coolant is orange in color and has a service interval of 5 years or 240,000 km (150,000 mi). However, when used on vehicles built prior to the introduction of DEX-COOL(R), maintenance intervals will remain the same as specified in the Owner's Manual.

^ If available, use the approved cooling system flush and fill machine (available through the GM Dealer Equipment Program) following the manufacturer's operating instructions.

^ If approved cooling system flush and fill machine is not available, drain the coolant and dispose of properly following the draining procedures in the appropriate Service Manual. Refill the system using clear, drinkable water and run the vehicle until the thermostat opens. Repeat and run the vehicle three (3) times to totally remove the old coolant or until the drained coolant is almost clear. Once the system is completely flushed, refill the cooling system to a 50%-60% concentration with DEX‐COOL(R), P/N 12346290 (in Canada, use P/N 10953464), GM specification 6277M, following the refill procedures in the appropriate Service Manual.

If a Service Manual is not available, fill half the capacity of the system with 100% DEX-COOL(R), P/N 12346290 (in Canada, use P/N 10953464), GM specification 6277M. Then slowly add clear, drinkable water (preferably distilled) to the system until the level of the coolant mixture has reached the base of the radiator neck. Wait two (2) minutes and reverify the coolant level. If necessary, add clean water to restore the coolant to the appropriate level.

Once the system is refilled, reverify the coolant concentration using a Refractometer J 23688 (Fahrenheit scale) or J 26568 (centigrade scale) coolant tester, or equivalent. The concentration levels should be between 50% and 65%.

Flushing Procedures using Conventional Silicated (Green Colored) Coolant

Important:
2004-2005 Chevrolet Aveo (Pontiac Wave, Canada Only) does not use DEX‐COOL(R). The Aveo and Wave are filled with conventional, silicated engine coolant that is blue in color. Silicated coolants are typically green in color and are required to be drained, flushed and refilled every 30,000 miles (48,000 km). The Aveo and Wave are to be serviced with conventional, silicated coolant. Use P/N 12378560 (1 gal) (in Canada, use P/N 88862159 (1 L). Refer to the Owner's Manual or Service Information (SI) for further information on OEM coolant.

Important:
Do not mix the OEM orange colored DEX-COOL(R) coolant with green colored coolant when adding coolant to the system or when servicing the vehicle's cooling system. Mixing the orange and green colored coolants will produce a brown coolant which may be a customer dissatisfier and will not extend the service interval to that of DEX-COOL(R). Conventional silicated coolants offered by GM Service and Parts Operations are green in color.

^ If available, use the approved cooling system flush and fill machine (available through the GM Dealer Equipment Program) following the manufacturer's operating instructions.

^ If approved cooling systems flush and fill machine is not available, drain coolant and dispose of properly following the draining procedures in appropriate Service Manual. Refill the system using clear, drinkable water and run vehicle until thermostat opens. Repeat and run vehicle three (3) times to totally remove old coolant or until drained coolant is almost clear. Once the system is completely flushed, refill the cooling system to a 50%-60% concentration with a good quality ethylene glycol base engine coolant, P/N 12378560, 1 gal (in Canada, use P/N 88862159 1 L), conforming to GM specification 1825M, or recycled coolant conforming to GM specification 1825M, following the refill procedures in the appropriate Service Manual.

If a Service Manual is not available, fill half the capacity of the system with 100% good quality ethylene glycol base (green colored) engine coolant, P/N 12378560 1 gal., (in Canada, use P/N 88862159 1 L) conforming to GM specification 1825M. Then slowly add clear, drinkable water (preferably distilled) to system until the level of the coolant mixture has reached the base of the radiator neck. Wait two (2) minutes and recheck coolant level. If necessary, add clean water to restore coolant to the appropriate level.

Once the system is refilled, recheck the coolant concentration using a Refractometer J 23688 (Fahrenheit scale) or J 26568 (centigrade scale) coolant tester, or equivalent. Concentration levels should be between 50% and 65%.

Response From anavrin

Wow. Great info. This place is awesome. Thanks for your help. I'll make sure to use the right coolant next time. I've got a date with the dashboard this weekend.

Response From Discretesignals

Just be careful and don't blow your face off working around the air bag system. Your probably going to be working around zones 3 & 5, so disarm those zones before removing any components or working around their circuits after disconnecting the battery.



SIR SERVICE PRECAUTIONS

CAUTION: When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling and Enabling Zones. Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs.

The inflatable restraint sensing and diagnostic module (SDM) maintains a reserved energy supply. The reserved energy supply provides deployment power for the air bags. Deployment power is available for as much as 1 minute after disconnecting the vehicle power. Disabling the SIR system prevents deployment of the air bags from the reserved energy supply.


GENERAL SERVICE INSTRUCTIONS

The following are general service instructions which must be followed in order to properly repair the vehicle and return it to its original integrity:
- Do not expose inflator modules to temperatures above 65 °C (150 °F).
- Verify the correct replacement part number. Do not substitute a component from a different vehicle.
- Use only original GM replacement parts available from your authorized GM dealer. Do not use salvaged parts for repairs to the SIR system.

Discard any of the following components if it has been dropped from a height of 91 cm (3 ft) or greater:
- Inflatable restraint sensing and diagnostic module (SDM)
- Inflatable restraint I/P module
- Inflatable restraint steering wheel module
- Inflatable restraint steering wheel module coil
- Inflatable restraint roof rail modules
- Inflatable restraint sides (SIS)
- Inflatable restraint seat be pretensioners
- Inflatable restraint front end sensor.





Zone 3 disarm:

1. Turn the steering wheel so that the vehicles wheels are pointing straight ahead.
2. Turn the ignition switch to the OFF position.
3. Remove the key from the ignition switch.
4. Locate the body control module fuse center then remove the fuse center cover.

5. Locate and remove the AIR BAG fuse from the body control module fuse center.

IMPORTANT: With the AIR BAG fuse removed and the ignition switch in the ON position, the AIR BAG warning indicator illuminates. This is normal operation, and does not indicate an SIR system malfunction.

6. Remove the connector position assurance (CPA) from the steering wheel module coil connector.

7. Disconnect the steering wheel module coil connector from the vehicle harness connector.

ENABLING PROCEDURE
1. Remove the key from the ignition switch.

2. Connect the steering wheel module coil connector to the vehicle harness connector.
3. Install the CPA to the steering wheel module coil connector.

4. Install the AIR BAG fuse into the body control module fuse center.
5. Install the body control module fuse center cover.
6. Use caution while reaching in and turn the ignition switch to the ON position.The AIR BAG indicator will flash then turn OFF.
7. Perform the SIR Diagnostic System Check if the AIR BAG warning indicator does not operate as described. Refer to Diagnostic System Check - Vehicle in Vehicle DTC Information.

Zone 5 disarm:


SIR DISABLING AND ENABLING ZONE 5

DISABLING PROCEDURE
1. Turn the steering wheel so that the vehicles wheels are pointing straight ahead.
2. Turn the ignition switch to the OFF position.
3. Remove the key from the ignition switch.
4. Locate the body control module fuse center, then remove the fuse center cover.

5. Locate and remove the AIR BAG fuse from the body control module fuse center.

IMPORTANT: With the AIR BAG fuse removed and the ignition switch in the ON position, the AIR BAG warning indicator illuminates. This is normal operation, and does not indicate an SIR system malfunction.

6. Remove the connector position assurance (CPA) from the I/P module connector.
7. Disconnect the I/P module connector from the vehicle harness connector.

ENABLING PROCEDURE
1. Remove the key from the ignition switch.

2. Connect the I/P module connector to the vehicle harness connector.
3. Install the CPA to the I/P module connector.

4. Install the AIR BAG fuse into the body control module fuse center.
5. Install the body control module fuse center cover.
6. Use caution while reaching in and turn the ignition switch to the ON position.The AIR BAG indicator will flash then turn OFF.
7. Perform the SIR Diagnostic System Check if the AIR BAG warning indicator does not operate as described. Refer to Diagnostic System Check - Vehicle in Vehicle DTC Information.

Response From anavrin

Thanks Discretesignals. I will definitely be careful. You may have saved my face. :)