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Stant
2006 Hummer H2 Engine Coolant Thermostat 8 Cyl 6.0L Stant - Heavy-Duty Thermostat

P311-132AD71    14948  New

33963 , 7456-187 , 12568911 , 1430846 , 12600172 , 30358 , 12581595 , 12600171 , 14948 , 92177005 , 12581594 , 12570358 , 456-187 , 506186 , 524-190

Qty:
$12.11
Stant Engine Coolant Thermostat
  • Stant Heavy-Duty Thermostat
  • Temperature 186 Degrees With Seal Included W/GM Replacement Water Pump; Excludes Housing; OE Temperature
  • Heavy-Duty Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): 1.5
    • Flange Diameter (With Seal) (in): 2.27
    • Flange Diameter (Without Seal) (in): 2.27
    • Height from Flange to Bottom (in): 1.82
    • Height from Flange to Top of Bridge (in): 0.95
    • Temperature (F): 186 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
2006 - Hummer H2 V 8 Cyl 6.0L 364 5967
Stant
2004 Hummer H1 Engine Coolant Thermostat 8 Cyl 6.5L Stant - OE Type Thermostat

P311-4C22889    14399  New

385190 , 12559336 , 33922 , E5TZ8575C , 131103 , 131-103 , 423-195 , 32089

Qty:
$19.19
Stant Engine Coolant Thermostat
  • Stant OE Type Thermostat
  • Temperature 190 Degrees With Seal Included OE Temperature
  • OE Type Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): N/a
    • Flange Diameter (With Seal) (in): 2.3
    • Flange Diameter (Without Seal) (in): 2.3
    • Temperature (F): 190 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
2004 - Hummer H1 V 8 Cyl 6.5L 395 -
Stant
2007 Hummer H2 Engine Coolant Thermostat 8 Cyl 6.0L Stant - Heavy-Duty Thermostat

P311-132AD71    14948  New

33963 , 7456-187 , 12568911 , 1430846 , 12600172 , 30358 , 12581595 , 12600171 , 14948 , 92177005 , 12581594 , 12570358 , 456-187 , 506186 , 524-190

Qty:
$12.11
Stant Engine Coolant Thermostat
  • Stant Heavy-Duty Thermostat
  • Temperature 186 Degrees With Seal Included W/GM Replacement Water Pump; OE Temperature
  • Heavy-Duty Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): 1.5
    • Flange Diameter (With Seal) (in): 2.27
    • Flange Diameter (Without Seal) (in): 2.27
    • Height from Flange to Bottom (in): 1.82
    • Height from Flange to Top of Bridge (in): 0.95
    • Temperature (F): 186 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
2007 - Hummer H2 V 8 Cyl 6.0L 364 5967
Stant
2006 Hummer H1 Engine Coolant Thermostat 8 Cyl 6.6L Stant - OE Type Thermostat

P311-55990FA    14738  New

31678 , 448-180 , 390180 , 7448-180 , 97241130 , 33947

Qty:
$12.49
Stant Engine Coolant Thermostat
  • Stant OE Type Thermostat
  • Temperature 180 Degrees With Seal Included
  • OE Type Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): N/a
    • Flange Diameter (With Seal) (in): 2.2
    • Flange Diameter (Without Seal) (in): 2.2
    • Height from Flange to Bottom (in): 1.15
    • Height from Flange to Top of Bridge (in): 0.6
    • Temperature (F): 180 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
2006 - Hummer H1 V 8 Cyl 6.6L 400 -
Stant
2006 Hummer H1 Engine Coolant Thermostat 8 Cyl 6.6L Stant - OE Type Thermostat

P311-2C29ABC    14728  New

389195 , 447-185 , 33946 , 97241129 , 31598

Qty:
$14.99
Stant Engine Coolant Thermostat
  • Stant OE Type Thermostat
  • Temperature 185 Degrees With Seal Included
  • OE Type Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): 1.17
    • Flange Diameter (With Seal) (in): 2.2
    • Flange Diameter (Without Seal) (in): 2.2
    • Height from Flange to Bottom (in): 1.4
    • Height from Flange to Top of Bridge (in): 1.1
    • Temperature (F): 185 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
2006 - Hummer H1 V 8 Cyl 6.6L 400 -
Stant
2010 Hummer H3 Engine Coolant Thermostat 8 Cyl 5.3L Stant - OE Type Thermostat

P311-14BA434    15158  New

31718 , 523-190 , 89017851 , 12587396 , 34198 , 455808 , 89018168

Qty:
$13.44
Stant Engine Coolant Thermostat
  • Stant OE Type Thermostat
  • Temperature 190 Degrees With Seal Included OE Temperature
  • OE Type Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): 1.44
    • Flange Diameter (With Seal) (in): 2.335
    • Flange Diameter (Without Seal) (in): 2.205
    • Height from Flange to Bottom (in): 2.16
    • Temperature (F): 190 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
2010 - Hummer H3 V 8 Cyl 5.3L 325 5328
Stant
2010 Hummer H3T Engine Coolant Thermostat 8 Cyl 5.3L Stant - OE Type Thermostat

P311-14BA434    15158  New

31718 , 523-190 , 89017851 , 12587396 , 34198 , 455808 , 89018168

Qty:
$13.44
Stant Engine Coolant Thermostat
  • Stant OE Type Thermostat
  • Temperature 190 Degrees With Seal Included
  • OE Type Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): 1.44
    • Flange Diameter (With Seal) (in): 2.335
    • Flange Diameter (Without Seal) (in): 2.205
    • Height from Flange to Bottom (in): 2.16
    • Temperature (F): 190 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
2010 - Hummer H3T V 8 Cyl 5.3L 325 5328
Gates
2003 Hummer H2 Engine Coolant Thermostat Gates

P311-2C67B67    W0133-1686955  New

Qty:
$33.41
  • OE Type
  • with Three Bolt Pattern
Brand: Gates
Additional Fitment Information:
Vehicle
2003 - Hummer H2
ACDelco
2003 Hummer H2 Engine Coolant Thermostat ACDelco

P311-03992A8    W0133-1686955  New

Qty:
$70.98
ACDelco Engine Coolant Thermostat
  • 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.
  • GM Original Equipment
  • with Three Bolt Pattern
  • Includes Coolant Outlet Housing and O-Ring. Used On Pumps with Casting # 12562459. If Water Pump Has Been Replaced By 2004 or Newer Pump, Must Also Use 2004 or Newer Inlet.
Brand: ACDelco
Additional Fitment Information:
Vehicle
2003 - Hummer H2
Gates
2006 Hummer H2 Engine Coolant Thermostat Gates

P311-2C67B67    W0133-1686955  New

Qty:
$33.41
  • OE Type
  • with Housing and with Three Bolt Pattern
Brand: Gates
Additional Fitment Information:
Vehicle
2006 - Hummer H2
ACDelco
2006 Hummer H2 Engine Coolant Thermostat ACDelco

P311-03992A8    W0133-1686955  New

Qty:
$70.98
ACDelco Engine Coolant Thermostat
  • 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.
  • GM Original Equipment
  • with Housing and with Three Bolt Pattern
  • Includes Coolant Outlet Housing and O-Ring. Used On Pumps with Casting # 12562459. If Water Pump Has Been Replaced By 2004 or Newer Pump, Must Also Use 2004 or Newer Inlet.
Brand: ACDelco
Additional Fitment Information:
Vehicle
2006 - Hummer H2
Gates
2006 Hummer H2 Engine Coolant Thermostat Gates - with O-Ring

P311-1093638    W0133-1783286  New

Qty:
$19.96
  • OE Type
  • w/o Housing
  • with O-Ring
Brand: Gates
Additional Fitment Information:
Vehicle
2006 - Hummer H2
ACDelco
2006 Hummer H2 Engine Coolant Thermostat ACDelco - w/o O-Ring

P311-3D33C49    W0133-1783286  New

Qty:
$37.91
ACDelco Engine Coolant Thermostat
  • 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.
  • GM Original Equipment
  • w/o Housing
  • w/o O-Ring
Brand: ACDelco
Additional Fitment Information:
Vehicle
2006 - Hummer H2
ACDelco
2006 Hummer H2 Engine Coolant Thermostat ACDelco - with Gasket

P311-3D33C49    W0133-1783286  New

Qty:
$37.91
ACDelco Engine Coolant Thermostat
  • Professional
  • w/o Housing
  • with Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle
2006 - Hummer H2
ACDelco
2003 Hummer H2 Engine Coolant Thermostat ACDelco

P311-3787E2C    W0133-1783287  New

Qty:
$71.06
ACDelco Engine Coolant Thermostat
  • 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.
  • GM Original Equipment
  • with Two Bolt Pattern
  • Includes Coolant Outlet Housing and Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle
2003 - Hummer H2
ACDelco
2006 Hummer H2 Engine Coolant Thermostat ACDelco

P311-3787E2C    W0133-1783287  New

Qty:
$71.06
ACDelco Engine Coolant Thermostat
  • 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.
  • GM Original Equipment
  • with Housing and with Two Bolt Pattern
  • Includes Coolant Outlet Housing and Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle
2006 - Hummer H2
ACDelco
2006 Hummer H3 Engine Coolant Thermostat ACDelco

P311-1A388FE    W0133-1972338  New

Qty:
$56.39
ACDelco Engine Coolant Thermostat
  • 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.
  • GM Original Equipment
  • Includes Coolant Outlet Housing and O-Ring
Brand: ACDelco
Additional Fitment Information:
Vehicle
2006 - Hummer H3
Gates
2010 Hummer H3T Engine Coolant Thermostat 5 Cyl 3.7L Gates

P311-0FFCBA3    W0133-1972338  New

Qty:
$71.69
  • OE Type
  • Includes Coolant Outlet Housing and O-Ring
Brand: Gates
Additional Fitment Information:
Vehicle Block Engine CID CC
2010 - Hummer H3T L 5 Cyl 3.7L 223 3654
ACDelco
2010 Hummer H3T Engine Coolant Thermostat 5 Cyl 3.7L ACDelco

P311-1A388FE    W0133-1972338  New

Qty:
$56.39
ACDelco Engine Coolant Thermostat
  • 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.
  • GM Original Equipment
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2010 - Hummer H3T L 5 Cyl 3.7L 223 3654
ACDelco
2010 Hummer H3T Engine Coolant Thermostat 8 Cyl 5.3L ACDelco

P311-0277E91    W0133-1821992  New

Qty:
$73.21
ACDelco Engine Coolant Thermostat
  • 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.
  • GM Original Equipment
  • Includes Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2010 - Hummer H3T V 8 Cyl 5.3L 325 5328

Latest Hummer Repair and Thermostat Installation Advice

CarJunky AutoAdvice

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. :)

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%.