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Resources for the Repair and Maintenance of your Hummer

Hummer Models:

Image for car images Hummer 2003 2007 Hummer H2 c size thumb Image for car images Hummer 2006 2009 Hummer H3 size thumb

Hummer Problems

Exhaust & Emissions -- Verified

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

Engine -- Verified

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The engine may develop a misfire due to worn valve seats. This fault will cause the Check Engine Light to illuminate. Replacement of the cylinder head may be required to correct this concern.

Heating & Air Conditioning -- Verified

One or more heater & AC (HVAC) temperature and/or air delivery mode door actuator may fail, resulting in improper temperature or air delivery. If this occurs, fault code(s) should be stored in the HVAC control module which should assist in diagnoses.

Engine -- Verified

The fuel pump may fail causing the engine to stall and not restart.

Miscellaneous -- Verified

The CD player may fail due to an internal fault with the radio. Our technicians tell us that in most cases, the radio unit will need to be sent to a specialty repair shop to correct this issue.

Hummer Recalls (Recent)

Hummer Recall 06V417000

Body, Interior & Misc., November 6, 2006

Summary:

CERTAIN VEHICLES ORIGINALLY BUILT WITH CLOTH SEATS THAT WERE EQUIPPED WITH AN AUTOMATIC AIR BAG PASSENGER SENSING SYSTEM AND LATER REUPHOLSTERED WITH AFTERMARKET LEATHER SEAT COVER KITS ARE INVOLVED. TESTING HAS INDICATED THAT THE AFTERMARKET LEATHER SEAT COVERS CAN CAUSE THE PASSENGER SENSING SYSTEM TO MALFUNCTION.

Tire and Loading Information Labels Are Innacurate

Body, Interior & Misc., March 31, 2006
RepairPal Expert Overview:

The tire and loading information label on the driver's side door frame may be inaccurate. A misprinted label could lead to overloading of the vehicle, which could possibly lead to tire failure and a crash. Owners will be provided with corrected labels and installation instructions. At customers' request, a dealer can install the label for them. The recall began March 31, 2006. The GM recall number is 05109.

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Rear Seat Belt for Smaller Passengers May Not Fit Correctly

Body, Interior & Misc., July 21, 2005
RepairPal Expert Overview:

The second row center seat belt routing may make it difficult to position correctly on smaller passengers. If the seat belt rides up to fit around the abdomen, the risk of internal injury is increased in a crash. Dealers will cut the guide loop, remove a portion of the loop, and the remaining sides should be folded over and secured with a retainer. The recall began July 21, 2005. The GM recall number is 05037.

Hydro-Boost Relief Valve May Not Function Properly

Brakes, June 18, 2004
RepairPal Expert Overview:

The hydro-boost housing relief valve bore may be out of specification. The seal may fracture as a result, which may reduce braking assist and slightly increase the steering effort while braking. Under certain conditions, more braking effort will be required to stop the vehicle. Dealers will replace the hydro-boost relief valve. The recall began June 18, 2004. The GM recall number is 04004.

Power Steering Hose May Burst

Suspension & Steering, October 14, 2005
RepairPal Expert Overview:

Some vehicles have a power steering hose that was not made to specification and may rupture under extreme steering conditions. If this were to happen, power steering assist would be lost and steering effort would increase. On vehicles equipped with hydro-boost brakes, braking effort would also increase. If power steering fluid were to spray on hot engine parts, an engine compartment fire could also occur. Dealers will inspect the power steering hose(s) for the two suspect date codes and replace them if needed. The recall began October 14, 2005. The GM recall number is 05086.

Hummer Questions and Answers

regatta, 2003 Hummer H2, Gilbert, AZ

Air escapes from the air bags. There are no punctures. Could it be a sensor?

jab228, 2003 Hummer H2, Maryland Heights, MO

Where is the fuel pump located on a 2003 Hummer H2? Side mount or in tank? If in tank is there an access panel from inside the truck?

jesshayes, 2003 Hummer H2, Houston, MO

i was driving down road with my gaslight on and it stopped i put gas in it and it wont even turn over. whats wrong

jab228, 2003 Hummer H2, Maryland Heights, MO

I had the front driver side hub assembly replaced recently and since then my ABS, Brake, and Traction control dash warning light comes on. Prior to this replacement the warning lights never came o...

molara, 2003 Hummer H2, Chicago, IL

air conditioner no longer blows air

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Hummer Owners' Reviews

Three years since my last update, and still an AWESOME MACHINE.
the MACHINE IS ALMOST NINE YEARS OLD and kicking ass...

heater on driver side seat come on

Love the vehicle. Used to have an H1 as a company vehicle and fell in love with them. As a private buyer and not a business the H3 fit the bill. Not as bad on gas as I thought it would be, I am averaging about 19-20 MPG. I have taken it rock climbing and found it a very capable off road vehicle and I like the size and weight for in town and highway driving. It makes me feel safe and it still does stand out in a crowd...not many in town, so people can find by looking for the vehicle...LoL.
PS, I am actually in Sault Ste. Marie, Ontario, Canada.
PPS...works great in the snow too.

I have owned 2 hummers H3;s Love the ride , love every thing about it. turns on a dime, don't have to plow,haha
but now when I turn it over it decides it won't. give it 5-10 minutes and it starts! what is up with this???? Susan

Check engine light came on sent vehicle to dealer to check out since onstar did a diagnostic check at my request. And informing me that there was a P0520 (emission sensor) and a P0442 (Oil Pressure sensing system). Dealer Quote 80413 worn shorted labor 2.5 hrs. verify customer concern diagnose found DTC P0106, P0520, p0442 set.check system circuit found DTC P0442 small evap leak set due to bad- O-ring seal inside gas cap. replace gas cap retest pass road test pass. 13 CPK 337.50
1 PCM-REMAN 410.32
1 CAP 41.40
The also check for a coolant leak
CREDIT ME FOR ANOTHER 2.5 HRS. FOR Diagnostic codes supplied by Onstar Dealer Quote (Pressure test coolant system found coolant leaking from radiator along Top of Radiator. Replace top off coolant. retest pass.
13 CPK 337.50
1 Radiator 413.51
1 Coolant 19.28
1 Fluid 7.07
AFTER GETTING MY VEHICLE BACK THE VERY NEXT DAY AIR CONDITION FAN JUST STOP !!
I figured that this was something they did guess what??
cost me another 485. for sensory for fan sensory unit.
my Hummer H3 true story.
Factory warranty ends at 80,000 my truck was at 80,413 over limit.

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