20 Most Recent 2009 Hummer H2 Questions & Answers

first check to see if anything is blocking the tracks if so remove. next it could be the switch if passenger side has controls try swapping them if passenger side does not have controls take switch off and check the resistance in the switch when in the on position (forward or back) if it is not the switch motor is probably burned out if passenger side again has motor try swapping. (passengers don't need to be comfortable) or just buy a new motor. hope this helps

I have read that there may be an issue with the seat motor control unit. Check with your dealer on a recall or tech bulletin. It may need to be reprogrammed to work properly. Although this is for a 2004 it may carry over to the 2009 model: Document ID# 1694588 2004 Chevrolet Tahoe - 4WD -------------------------------------------------------------------------------- Subject: Memory Seat May Not Return to Requested Position (Reprogram Driver Seat Module) #04-08-50-016C - (08/12/2005) Models: 2003-2005 Cadillac Escalade, Escalade ESV, Escalade EXT 2003-2005 Chevrolet Avalanche, Silverado, Suburban, Tahoe 2003-2005 GMC Sierra, Yukon, Yukon XL, Yukon Denali All with Seat FRT, Individual (Non BKT) (RPO AN3) 2003-2005 HUMMER H2 with Seat, Front Bucket Deluxe (RPO AR9) This bulletin is being revised to update the correction information. Please discard Corporate Bulletin Number 04-08-50-016B (Section 08 -- Body and Accessories). Condition: Some customers may comment that with repeated cycling of the memory seat between the 'exit' and one of the 'presets', the position of the seat may "creep" forward or rearward out of expected adjustment. Cause: There is a coding deficiency in the software for the memory seat module. Correction: Technicians are to reprogram the driver seat module with an updated software calibration. The previous bulletin stated to use a service calibration that was released with TIS satellite data update version 4.5. Feedback has proved that calibration to be ineffective in eliminating the memory seat creep condition. An updated service calibration was released with TIS satellite data update version 6.5 available June 13, 2005. This new calibration has additional memory seat creep protection. As always, make sure your Tech 2® is updated with the latest software version. Important: After programming is complete, move the seat all the way rearward and down, then bump the seat slightly forward and up. This position will be just off the end of travel hard stops. Reset both memory seat exit positions at this position. Having the seat set at just off the hard stops will aid in reducing the creep condition. Warranty Information Labor Operation Description Labor Time N9524* Driver Seat Module - Reprogram 0.4 hr *This is a unique labor operation number for use only with this bulletin. This number will not be published in the Labor Time Guide. GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION © Copyright General Motors Corporation. All Rights Reserved. -------------------------------------------------------------------------------- Document ID# 1694588 2004 Chevrolet Tahoe

Check the airsuspension bags might be leaking and may need to be replaced.Recently changed mine on the 2005 Hummer H2

as the pump just supplies pressure the fault would be in both directions--so eliminate the pump It could be the valve body in the steering box or failing hoses from the box I suggest that a diagnosis by an accredited steering specialist may save lots of money

Delete all the old Bluetooth info and reprogram it If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_4c166ba81493f541

My guess would be a leaking intake or head gasket. Water in the cylinder(s) is shorting the spark plug until the temp comes up on the engine. The white smoke is the coolant being burnt off. check your coolant level it may be low.

change oil every 10k,as your hummer is computer controlled you never need to tune it,BUT,if you use a high grade(octane)fuel, the vehecle will run better(im told)

show photo of it. how can anyone guess.

GOOGLE HOW TO BLEED BRAKES YOUTUBE. THERE ARE MANY WAYS LIKE FACTORY PRESSURE BLEED WAY!!!!! GRAVITY BLEED, VACUUM BLEED. or there 100 year way, 2man foot and zerk like fitting open close way. at each caliper. Pump up foot,valve open, bleeds, close valve , foot up. repeat tell your eyes glaze over.bored. Some cars you need ABS tool to go to bleed mode.

If the 4WD service light comes on when you start your Hummer H2, it could indicate a problem with the four-wheel drive system. This warning light could indicate a problem with the transfer case, the drive shaft, the front or rear differential, or other components of the 4WD system. It is recommended to take your vehicle to a certified mechanic or a Hummer dealership for proper diagnosis and repair. The service light coming on could be a sign of a serious problem, and it is important to address it promptly to avoid further damage to your vehicle and ensure safe operation.

i know you said you have flushed through the sunroof drain channels , have you actually cleared all four out let tubes , one ine each corner of sunroof tray ,there are rubber tubes from these outlets tath emerge at the wheel arches behind inner arch covers its ussually the back ones that get forgotten ,a good tool to use is a flexible domestic pipe cleanring rod ,used by plumbers for sink blockages etc let me know if this was of any help cheers

There are some possibilities that you will have to get checked. Possible causes.....
1. HVAC Control Module needs recalibration.
2. Control Head needs replacing.
3. Refrigerant System leak. 4) The blower door actuator. the blower door actuator. The HVAC system under the passengers dash, to access it remove the cover below the glove compartment, 2 screws. The drivers blower door actuator motor is closest to the transmission tunnel and is held in place with 2 screws. The Passenger blower door actuator is directly above it on the TOP of the housing. Remove the glove compartment and you can get to it on the top of the HVAC system. Reach up and unplug it and plug it back in first. if it does not correct it you will need to replace it. It is not an easy job since most of the dash must be removed. Start by removing all the decorative allen bolts accross the dash. The center section can be pulled forward an inch or so. This will allow you to remove the trim around the speedometer cluster and drivers a/c vent. The passengers side is a little tricky. You need to remove the side panel that rests up against the door panel. Shine a light in at the upper left corner and you will see a white button aprox 1/8" wide and 1/2" tall this needs to be pushed in with a flat blad screwdriver while gently pulling out on the passenger grab bar(above the airbag). The second white button can be reached throught the far left glove compartment opening. I reached up and pushed in on the white button on this side while pulling out on the handle. This will allow the handle to be removed and the trim peices following. You can now see the screws that hold the upper dash cover there are aprox 3 screws on the driver and passenger side. You also have 2 in the center behind the center trim piece pull forward an inch or so and a 1/4" drive socket will get to the screws here. It then just pulls straight forward NOT UP. and don't forget to unplug the sun sensor on the dash.
Remove the clip holding the duct work you will now see is connected to the backside of the dash passengers side. You can secure it from the outside when reassembling. The acctuator can be seen and replaced. It is still tight but I did not have to take it to the dealer. You have 3 actuators on the H2 that is Drivers side, Passenges side, and recirculate. I would suggest whil you are under the dash remove the blower motor (3 screws and clean out the fan shoot some compressed air in to get any other dust out.). if in your ac system you are using dual control system then, The heater control valve has failed and is open allowing the passenger side heater core to stay hot. It is a very common problem and expensive to repair. It tends to be an intermittent problem and sometimes will work properly. The heater control valve needs to be checked. Dual Climate Control Valve (DCCV) is failed.
If the heater valve is checked ok then the other possibilities which can make this problem occur are.
the blend door and the blend door actuator.Either the blend door is got craked or getting blocked or the actuator is got broken.
Thanks. keep updated for any more query.you can rate this solution and show your appreciation.

no info generic answer no by-pass have vehicle scanned for trouble code ----how did you evaluate that problem is security ---failing ignition switch -fuel filter/pump -- failing sensor loose or damaged wire and about 50 more reasons check and test first 3 to narrow down to electrical or fuel problem

The wiring diagram is in the service manualhttp://ep.yimg.com/ty/cdn/yhst-58070679164175/HummerRepairManual.pdf

What is the problem ???