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ACDelco
2009 Hummer H2 Brake Light Switch ACDelco

P311-21AB1CD    W0133-1787782  New

Qty:
$19.68
ACDelco Brake Light Switch
  • 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
2009 - Hummer H2
ACDelco
2009 Hummer H2 Starter Relay ACDelco

P311-3CE6F47    W0133-1869849  New

Qty:
$40.51
ACDelco Starter Relay
  • 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
2009 - Hummer H2
ACDelco
2003 Hummer H2 Radiator ACDelco

P311-53FAEA5    W0133-1959151  New

Qty:
$483.64
ACDelco Radiator
  • 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 OE Lifetime Warranty
Brand: ACDelco
Additional Fitment Information:
Vehicle
2003 - Hummer H2
Moog
2009 Hummer H2 Adjustable Torsion Bar Key - Front Moog

P311-5C0C062    K100012  New

13100012 , 45K31002 , VV100012 , XL325328CA , 264-7002 , 625-1002 , AA7002E

Qty:
$161.93
Moog Adjustable Torsion Bar Key  Front
  • Adjustable Torsion Bar Key
  • Product Attributes:
    • Feature 1: Allows Adjustment Range From 1/2 To 1 1/2
    • Feature 2: Restores Ride Height To Be Within Oe Specifications For Vehicles With A Fatigued Torsion Bar
  • MOOG Problem Solver products incorporate proven design and engineering features for like new steering, ease of installation and longer life. MOOG is the preferred steering and suspension brand of professional technicians and NASCAR crew chiefs.
Brand: Moog
Position: Front
Additional Fitment Information:
Vehicle Position
2009 - Hummer H2 Front
ACDelco
2008 Hummer H2 Ignition Coil ACDelco

P311-45AF6BA    W0133-1933228  New

Qty:
$133.78
ACDelco Ignition Coil
  • 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 Melco/ Mitsubishi Ignition - Square Shaped
Brand: ACDelco
Additional Fitment Information:
Vehicle
2008 - Hummer H2
Prenco
2008 Hummer H2 Ignition Coil Prenco

P311-1628AC7    W0133-1933228  New

Qty:
$83.43
Prenco Ignition Coil
  • with Melco/ Mitsubishi Ignition - Square Shaped
Brand: Prenco
Additional Fitment Information:
Vehicle
2008 - Hummer H2
Husky Liners
2003 Hummer H2 Floor Mat Set - Rear Husky Liners - Heavy Duty Floor Mat

P311-08F4DF7    52021  New

Qty:
$57.95
Husky Liners Floor Mat Set  Rear
  • 2nd Or 3rd Seat Floor Mats
  • Black; 2 pc.; Does Not Cover Hump
  • Heavy Duty Floor Mat
  • Product Attributes:
    • Color: Black
    • Material: Rubber
    • Position: Rear
    • Style: Molded
    • WARNING CA Proposition 65: Yes
    • WARNING CA Proposition 65 Message: Cancer And Reproductive
  • Available for virtually all of today's top selling vehicles, Husky Liners(R) Heavy Duty Floor Mats are made ultra tough to take whatever abuse you throw at them. Other mats have met their match.
Brand: Husky Liners
Position: Rear
Additional Fitment Information:
Vehicle Position
2003 - Hummer H2 Rear
Husky Liners
2005 Hummer H2 Floor Mat Set - Rear Husky Liners - Heavy Duty Floor Mat

P311-08F4DF7    52021  New

Qty:
$57.95
Husky Liners Floor Mat Set  Rear
  • 2nd Or 3rd Seat Floor Mats
  • Black; 2 pc.; Does Not Cover Hump May Require Trimming For Correct Fit/Trim Guides Molded In Mat
  • Heavy Duty Floor Mat
  • Product Attributes:
    • Color: Black
    • Material: Rubber
    • Position: Rear
    • Style: Molded
    • WARNING CA Proposition 65: Yes
    • WARNING CA Proposition 65 Message: Cancer And Reproductive
  • Available for virtually all of today's top selling vehicles, Husky Liners(R) Heavy Duty Floor Mats are made ultra tough to take whatever abuse you throw at them. Other mats have met their match.
Brand: Husky Liners
Position: Rear
Additional Fitment Information:
Vehicle Position
2005 - Hummer H2 Rear
Husky Liners
2005 Hummer H2 Floor Mat Set - Front Husky Liners - Classic Style Floor Liner

P311-29D6FAD    31301  New

Qty:
$96.95
Husky Liners Floor Mat Set  Front
  • Front Floor Liners
  • Black; 2 pc.; Front
  • Classic Style Floor Liner
  • Product Attributes:
    • Color: Black
    • Material: Rubber
    • Position: Front
    • Style: Molded
    • WARNING CA Proposition 65: Yes
    • WARNING CA Proposition 65 Message: Cancer And Reproductive
  • Our Classic Style Liners Set The Mold For Auto Floor Protection. Featuring Our Rugged Diamond Plate Look And Formfit Design, These Classic Liners Offer Protection For Vehicles Dating All The Way Back To The 1970s.
Brand: Husky Liners
Position: Front
Additional Fitment Information:
Vehicle Position
2005 - Hummer H2 Front
Husky Liners
2003 Hummer H2 Floor Mat Set - Front Husky Liners - Classic Style Floor Liner

P311-21CACAA    31302  New

Qty:
$96.95
Husky Liners Floor Mat Set  Front
  • Front Floor Liners
  • Gray; 2 pc.; Front
  • Classic Style Floor Liner
  • Product Attributes:
    • Color: Gray
    • Material: Rubber
    • Position: Front
    • Style: Molded
    • WARNING CA Proposition 65: Yes
    • WARNING CA Proposition 65 Message: Cancer And Reproductive
  • Our Classic Style Liners Set The Mold For Auto Floor Protection. Featuring Our Rugged Diamond Plate Look And Formfit Design, These Classic Liners Offer Protection For Vehicles Dating All The Way Back To The 1970s.
Brand: Husky Liners
Position: Front
Additional Fitment Information:
Vehicle Position
2003 - Hummer H2 Front

Showing 1 - 10 of 3,244 Products.


Latest Hummer H2 Repair Guides & Installation Advice

CarJunky AutoAdvice

Hummer H2 with loud clunking noise! (with video)

Showing 4 out of 4 Posts
Question From jimfromchile on Hummer H2 with loud clunking noise! (with video)

Hello everyone!

MY H2 NOISE VIDEO

Well this started just two days ago... I was driving my 2003 Hummer H2 when all a sudden when turning this horrific loud clunk noise started to occur when I turn, it doesn't matter if I turn right or left it makes this noise. Immediately I thought it was the power steering fluid, so I checked and of course it did not have any... so I refilled it and fixed the leak. But even so it makes that awful noise any ideas on what it can be?

I live in Chile here in south america and also in a small town, going to a dealer is not an option. So please help?

Response From Hammer Time

Is that coming from the rear or the front?

Response From jimfromchile Top Rated Answer

Its from the front, I can kinda feel a small vibration coming from the center of the engine or underneath center of the dash

Response From Hammer Time

You need to get it u[p in the air and inspected. It sounds like a drive axle binding or hitting something.

1993 ford ranger question please help !!!

Showing 2 out of 13 Posts | Show 11 Hidden Posts
Question From fokes123 on 1993 ford ranger question please help !!!

I have a 1993 ford ranger 2.3 and i am wondering if i can fit the k&n 57 Series FIPK cold air intake. The oldest year they have is 1995 ranger 2.3 and i am wondering if it would fit my 93 ranger. Also just to make sure with this k&n cold air intake, it would pass smog and be street legal? Thanks!

Response From Hammer Time

Yep, that cold air intake is just a waste of money.

Response From Discretesignals

Save yourself some money and make your own custom cold air intake.


Response From Hammer Time

I don't know how they call these things COLD air intakes when they pull in the superheated air from under the hood. Just a way to take your money.

Response From Tom Greenleaf

OK - went a bit nuts but it's a serious misleading as bad as any Sham-Wow infomercial.
People: Gas/fuel doesn't like COLD air dag nabbit! If too cold it would never atomize (evaporate) to be able to work in time. All sorts of efforts are to warm air not cool it up to putting strong electric heaters under throttle body or carbs then AND run total exhaust heat as well so evaporating fuel (gets cold just doing that like sweat on your skin) can even ice up so it's making itself cold anyway and has to be corrected or you'd just flood out.


No clue how these scams get out there and not pulled from the market place instantly?


True: Cold air has more density (heavier) than warm air - Google out what a hot air balloon is lifted by


The end all is if any of these tricks worked at all or had any benefit it would be designed into the engines to begin with.


This and a ton of bullcrap sells so they keep making it. If it floats your boat go for it but don't complain when it's all worse than before you messed with it,


T

Response From fokes123

Thanks for all the help guys..... Dont really need your guys opinions on them i really didnt ask. You guys seemed to think i did but you all maged not to answer my question and insted just go on a rant about them. This was a waste of time IMO.....looks like I'll have to take this to a better forum.

Response From Hammer Time

No problem, We won't miss you.

Response From fokes123

Its funny because on your quote it says that you help answer questions but you didnt do jack shit and managed just to bag on me. Nice way to welcome new member on the forum. This is extremely dissapointing

Response From Discretesignals Top Rated Answer

Good information Tom. Like they say, K&N filters are really only good for filtering out rocks...lol. GM came out with a TSB a while back concerning those filters and how they were causing MAF issues. GM stated they wouldn't honor damage done by using those filters. K and N went bananas over that one.

SERVICE - ALL BUICK, CADILLAC, CHEVROLET, GMC TRUCK, ISUZU, OLDSMOBILE, PONTIAC AND HUMMER DEALERS


Subject: A/T Shift, Engine Driveability Concerns or SES Light On as a Result of the Installation of an Aftermarket Reusable, Excessively Oiled Air Filter -- 2004 and Prior Cars and Lt Duty Trucks and 2003-2004 HUMMER H2
Message #: VSS20040056

Corporate Bulletin Number 04-07-30-013 will be available in SI on March 18, 2004.

Automatic Transmission Shift, Engine Driveability Concerns or Service Engine Soon (SES)
Light On as a Result of the Installation of an Aftermarket Reusable, Excessively Oiled Air Filter

Models: 2004 and All Prior Cars and Light Duty Trucks
2003-2004 HUMMER H2

DO THIS
First, Inspect the vehicle for a reusable aftermarket excessively oiled air filter

DON'T DO THIS
DO NOT repair under warranty if concerns result from the use of a reusable aftermarket oiled air filter.

The installation of an aftermarket reusable, oiled air filter may result in:

1. Service Engine Soon (SES) Light On

2. Transmission shift concerns, slipping and damaged clutch(es) or band(s)

3. Engine driveability concerns, poor acceleration from a stop, limited engine RPM range

The oil that is used on these air filter elements may be transferred onto the Mass Air Flow (MAF) sensor causing contamination of the sensor. As a result, the Grams per Second (GPS) signal from the MAF may be low and any or all of the concerns listed above may occur.

When servicing a vehicle with any of these concerns, be sure to check for the presence of an aftermarket reusable, excessively oiled air filter. The MAF, GPS reading should be compared to a like vehicle with a OEM air box and filter under the same driving conditions to verify the concern.

Transmission or engine driveability concerns that are the result of the installation of an aftermarket reusable, excessively oiled air filter are not considered to be warrantable repair items.



Have you attempted to contact the manufacture to see if that would fit on your truck? As for passing emissions as long as it doesn't disturb how the air flows through the MAF sensor, you should be alright. To confirm, you should check the laws in your state concerning that.

This really is an automotive repair website dealing with factory manufacture designed vehicles and systems and how to troubleshoot and repair those systems. When you start getting into the realm of modifications and changes to the manufacture's intended design, you may not get good answers.

One good suggestion is to keep the old air intake ducting system just in case you run into issues or you want to sell the vehicle later.

Response From Hammer Time

This guy is just sucked in by all the hype nonsense and bogus claims.

He's spouted off long enough. Time to close this.

Response From Tom Greenleaf

Sorry for the harsh approach to what really should be a no brainer and no offence - the advertising is convincing with stuff but real results are so disappointing and costly to buy then don't work and costly to put back to what works!


K&N actually has a competitor for this market that's worse! Look up the Uban lore and myths of assorted products. Some you'll find great reviews but miss fine print that it isn't really tested and don't discuss it can also damage things for using them! Guess the budget for something is better spent not telling you that up front.


Makes this and other magic-in-a-can products a strong seller for the unwary. It's my/our fault to some degree that it's so clearly corrupted to sell this junk it gets taken out on the buyer who trusts the claims.
Graphs probably wont show below and I wont go looking for ones that will but if you really look into results of products of many assorted things never mind a vehicle that took mega thousands of hours to make and design as best as possible or loses a sale of a vehicle when new to another. It's suicide for a company to have an unhappy new vehicle buyer then the icing on the cake is nobody really want them used so really a disaster.


On just this air intake search I just did came up with OE air filter results done by real PPM of catching dirt and the CFM impact of air flowing thru filters and what loss would be expected at they were part dirty vs another. BTW in my hunt AC Delco came out on top of most testing! OE replacement stuff no alterations just quality of the product.


Changing to cold air just is beyond thinking it thru IMO and experience. Used to back when turn a round lid to an air filter upside down and get a neat carb/air intake roar with a load that did nothing but make noise and trash the filter fast but cost nothing and just put it back on properly was all you had to do so didn't do much harm short of getting a dirty air filter sooner and defeat WARM AIR pick up for cold starts and engine's initial time before whole engine warmed up and ran it's best. Do that stupid trick in the dead of Winter you would have real problems.


End all is the change you seek for whatever claimed benefit doesn't work and costs to do it then undo it when you find out. We really (or I was) were trying to warn you of a known failed idea not pick on you at all and did come out bit harsh. Sorry for that.


Try it if you want to find out for yourself. Measure before and after real changes yourself and then if you complain to this company bet you wont even get your money back!


Good luck. We really are all volunteering time and years of experience for that good no other motivation at this site,


Tom
Graph if it shows or search it out...........

Accumulative Gain:
“Accumulative Gain” is the total amount of dirt that passed through the filter during the test.

Response From Tom Greenleaf

They even advertise!

With honesty!


T

Response From Tom Greenleaf

IMO all that is junk you'll be removing later - don't even if it still runs well enough for an inspection it's of no use at all just costly,


T

New Alternator...voltage jumping 0-19

Showing 2 out of 10 Posts | Show 8 Hidden Posts
Question From dave284 on New Alternator...voltage jumping 0-19

2003 chev SS silverado 1500 6.0L, Had a new alternator installed and still doing same thing, gauge on dash goes to (0) then jumps to or pass 19,I used a meter and the read outs are not the same as the volts gauge, this vehicle was doing like this before the new alternator.I suppose the question is...is the voltage regulator inside the alternator or is it located somewhere else and does the computer control the regulator? There are no trouble codes and the battery is new, and I don't know if this have any connection with it but the oil pressure gauge has stopped working. Any insite would help, thanks.



Dave

Response From DanD

Chev pick-ups are famous for bad instrument clusters.
If the voltage at the battery is staying consistent and showing “normal” voltages then your charging system is likely ok?

Dan.

Response From dave284

Thanks Jim, I checked that out and the vehicle has 121,000 on it and so the dealership would charge for any repairs, I know some that the pcm controls the regulator....but the gauge was going from (0) to all the way to the other side....sometimes it stays at 14.Today I had the battery tested as well as the alternator at Autozone...battery good....alternator bad, but I also checked with a couple of chevrolet dealerships on this matter one told me that if the battery was disconnected it would have to be reprogrammed and the other said it it wouldn't unless another pcm was being installed???? Dan, the dealership also mentioned the cluster too, the batt showed 13.87 on my tester but when the vehicle was running the the numbers were jumping like crazy up and down so fast I couldn't read them...the last reading I got was 1.734 and the engine was stalling at that point. I ordered another alternator but wasn't positive on the amp rating 105 or 145?...so I went with the 105, I don't know what the original was since the one in it now is an aftermarket put in by another person....But soon as I get the new alternator in that should shed some light on this....until then I'm assuming that the little problems could be the result of the voltage problem. Thanks Jim & Dan, I'll let you all know something tomorrow.

Response From Double J

Just checked..the original alternators were stamped 130 amp but that is incorrect..
Its supposed to be the 145 amp


Jim

Response From DanD

Just had a read through the Pof O and this regulator is not PCM controlled on this year of truck.
I also think your right in waiting to diagnose the gauge issues, until you have a properly functioning charging system.
Keep throwing voltage spikes into the IPC and it’ll likely start speaking Chinese to you. LOL

Dan.

Response From dave284

Thats great, the owner just dropped off the one that has 105 amp tonight, Jim, this might be a stupid question but if the 145 amp is the right one why does Autozone offers a lower one for the same vehicle? I'm afraid to ask the dealerships.LOL.... Dan, I checked with two different manuals, one said the pcm controls the regulator and I believe that was the Haynes repair manual. So tomorrow I'll exchange the alternators, I'm hoping this will also take care of the oil pressure gauge and the dual climate control...both are set on a/c but one is blowing heat. I may have to learn chinese.LOL

Response From Double J Top Rated Answer

Here is the bulletin i read for this...


Bulletin No.: 04-06-03-001
Date: February 03, 2004
INFORMATIONSubject:
Incorrect Amp Code On Generator
Models:
2003-2004 Cadillac Escalade, Escalade ESV, Escalade EXT
2003-2004 Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe
2003-2004 GMC Denali XL, Savana, Sierra, Yukon, Yukon XL
2003-2004 HUMMER H2

The purpose of this bulletin is to inform the technician of an incorrect Amp code stamped on the generator. The code on the side of the generator reads 130 A and it should read 145 A. The 130 A has been stamped on the generators in error and does not indicate the actual amperage of the generator. A 130 A generator is not produced for this vehicle. The correct replacement for the above vehicles is the generator with the 145 A marking.

Jim

Response From dave284

Jim, would the difference severely affect the operation of the vehicle to the point where the climate control is working only on one side of a dual system, and the oil sending unit...I think its just bad. I'm still wondering about the pcm causing all this mess, you know, controlling the regulator. And if a low amp alternator is the cause, would the voltage be jumping like numbers to a combination lock?, something like this 8-10-47-9-36-3. I know the one manual stated the voltage regulator was computer controlled... its a bunch of aggravation when you can't get the right info, even from the manufacture.And Autozone don't stock one with a 145 amp rating,but Advance auto parts does, I was planning to switch out the one he brought last night...but he purchased it with a check...I'm at a stand still now. Thanks Jim....let me piss off the owner and tell him he has to drive another 50 miles to get to my shop.

Dave

Response From dave284

I replaced the PCM and had the chev dealership to (flash) program it...that took care of the alternator problem and also cured the dual climate control too, however the oil sending unit was bad on its own,thanks guys for your advice.

Response From Double J

Dave

GM does have concerns with the instrument panel cluster gauges.
They issued a 'Special Policy' on the clusters extending the warranty coverage on them to 7 years or 70k miles.
Not all vehicles are affected...Need to contact GM and Have them check by the vehicles VIN breakpoints.

Here is an excerpt from the bulletin...#07187A

Condition
Some customers of 2003-2004 model year Cadillac Escalade, Escalade ESV, and Escalade EXT; Chevrolet Avalanche, Silverado, Suburban, and Tahoe; and GMC Sierra, Yukon, and Yukon XL vehicles have reported that one or more of the instrument panel (IP) cluster gauges stick, flutter, or become inoperative. This may cause inaccurate readings, including the speedometer and fuel gauge.

Regulator is internal in the alternator.
You mentioned you used a meter and the readings are not the same.
What are they?

Hope this helps

Might/might not
Just passing it along

Jim

2004 Saturn L300 Clicking/ticking sound help!

Showing 2 out of 4 Posts | Show 2 Hidden Posts
Question From blehbleh2 on 2004 Saturn L300 Clicking/ticking sound help!

2004 Saturn L300 2.2L 4cly

When I turn on the car there's a loud clicking/ticking sound coming from the engine (idling) and the clicking speeds up based on RPMs. But after 1-2 minutes the engine warms up and the sound goes away completely.

Now I'm hesitant to bring it in to a mechanic because I only plan on keeping this vehicle for another year or two and I don't want to get in over my head in repair costs. I really have no idea if this is a cheap fix, decently cheap fix, or a drive it off a cliff fix.

Any ideas on what my problem could be and what the cost to fix it is would be greatly appreciated.

EDIT* 98000 miles, no warning lights.

Response From lansingautorepair

I would try a really good long engine flush and then use a good synthetic oil afterwards.





Signature removed.......... no advertising allowed

Response From Discretesignals Top Rated Answer

INFORMATION
Bulletin No.: 04-06-01-029E
Date: April 29, 2010

Subject: Unnecessary Flushing Services, Additive Recommendations and Proper Utilization of GM Simplified Maintenance Schedule to Enhance Customer Service Experience

Models:
2011 and Prior GM Passenger Cars and Trucks (including Saturn)2010 and Prior HUMMER H2, H32005-2009 Saab 9-7X

Supercede:This bulletin is being revised to update the model years and add information about the proper transmission flush procedure. Please discard Corporate Bulletin Number 04-06-01-029D (Section 06 - Engine/Propulsion System).

An Overview of Proper Vehicle Service

General Motors is aware that some companies are marketing tools and equipment to support a subsystem flushing procedures. These dedicated machines are in addition to many engine oil, cooling system, fuel system, A/C, transmission flush and steering system additives available to the consumer.

GM Vehicles under normal usage do not require any additional procedures or additives beyond what is advised under the former Vehicle Maintenance Schedules or the current Simplified Maintenance Schedules. Do not confuse machines available from Kent-Moore/SPX that are designed to aid and accelerate the process of fluid changing with these flushing machines.

Engine Crankcase Flushing

General Motors Corporation does not endorse or recommend engine crankcase flushing for any of its gasoline engines. Analysis of some of the aftermarket materials used for crankcase flushing indicate incompatibility with GM engine components and the potential for damage to some engine seals and bearings. Damage to engine components resulting from crankcase flushing IS NOT COVERED under the terms of the New Vehicle Warranty.

Response From Tom Greenleaf

Can't be sure but sounds like a sludged up engine so far. Try using Mobil 1 - lime capped 0-30 and it may clear up. Otherwise it will need more diagnosing,

T

04 GMC - HEAT OUT AC VENT

Showing 2 out of 6 Posts | Show 4 Hidden Posts
Question From dcraiga on 04 GMC - HEAT OUT AC VENT

I have a 2004 GMC Sierra 1500. The heat and air both work fine and the controls for heat and air work as designed, BUT, every once in a while, the drivers side vents will go to full heat without my changing settings on the controls. Once it goes to full heat, I can still change vent positions, floor, defrost, etc. but, cannot control the heat setting, it stays hot, UNTIL, I stop and turn the truck off and restart the engine. Then the air coming out on the drivers side will go back to the control setting. This usually only happens once and usually soon after I first start the truck and I am driving. After stopping and restarting the engine, it usually will not repeat on this run. Some have said blend door controls, but, the controls work well when it is not in this undesired heat mode. Anyone else had this and been able to correct the condition?

Response From Tom Greenleaf

Just so I/we know this is a regular pick up truck, single A/C system NOT w passenger and driver's side controls? So far if so this is a sign of low charge and perhaps icing of the evaporator. What MIGHT be happening is it ices up just partly so perhaps again as you didn't say the passenger's side gets cool and driver's side shouldn't be real heat just ambient air plus some as there is some heat from engine that does still up the vent temps on plain vent vs what it really is outside.

For this you take pressure first IMO and if off of norms find the leak which does account for the lion's share of A/C problems.

Icing seems strange I know but it can as it evaporates liquid refrigerant in the wrong spots and can be a problem to compressor on many if low it doesn't get the oil to lube the compressor well. Near sure this is a CCOT (clutch cycling orifice tube) set up for a pick up.

#1 is not to just add anything until things are known. Seek help as wrong moves a VERY costly!

T

Response From dcraiga

This is a regular cab GMC pickup. My controls do have separate driver and passenger side temperature settings. When I stop my vehicle, turn it off and restart the vehicle, the A/C immediately returns to normal and provides cool air to the driver side vents. The driver side is the only side experiencing this condition. It is full heat, when this does happen.

Response From Discretesignals

Like the PI states, have the HVAC control module scanned for trouble codes and inspect the connectors for terminal tension problems.

Response From Hammer Time

Does it have independent left and right temp controls?

Response From Discretesignals Top Rated Answer

#PIT3504D: Various HVAC Concerns And DTCs - keywords B0229 B0263 B0268 B0408 B0414 B0418 B0424 B3770 blow blower cold hot mode temperature warm - (Apr 2, 2008)

Subject: Various HVAC Concerns And DTCs

Models: 2003-2006 Cadillac Escalade, Escalade ESV, Escalade EXT

2003-2006 Chevrolet Avalanche, Suburban, Tahoe

2003-2007 Chevrolet Silverado Classic

2003-2007 GMC Sierra Classic

2003-2006 GMC Yukon and Yukon Denali Models

2003-2007 Hummer H2

--------------------------------------------------------------------------------

This PI is being updated to specify location. Please discard PIT3504C.

--------------------------------------------------------------------------------

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern: Some customers may comment on various HVAC concerns including temperature doors defaulting to full hot position or unable to obtain defrost position. Upon inspection, technicians may find DTCs B0414, B0424, B3770, B0418, B0408, B0263, B0268, and/or B0229 are set.

Recommendation/Instructions: Check the Right I/P junction block connectors C4, C5, and C8 (Document ID # 1562972) for poor terminal tension, backed out terminals or connectors not fully seated.