2005 Hummer H2 Problems

What owners report

Owners of this model year most often describe windshield wipers that run on their own, stop working, or spray washer fluid without command, plus instrument cluster gauges that stick or quit. Water intrusion is a recurring theme — from roof and sunroof drains and from the wiper module area — and several complaints tie a wet floor or a wet wiper motor to the trouble. Many of these reports appear between roughly 40,000 and 100,000 miles, with brake and steering complaints tending to arrive at higher mileage.

1. 1
   Visibility (wipers, defrost, mirrors)

   Windshield wipers run on their own, stop, or washer sprays

   • 18 complaints (23%)
   • median 61,830 mi at 5.4 yrs old (16 state mileage)
   • filed 2008–2020

   Owners describe wipers that come on by themselves, work only intermittently, only on high speed, or fail completely in rain, sometimes forcing them to pull over. Several also report the washer pump spraying until the reservoir is empty and continuing even with the vehicle off, requiring the battery or fuse to be disconnected. According to complaints, dealers attributed the behavior to water getting into the wiper motor or control module and replaced the module, and some owners note the same symptom was covered by a wiper-motor recall on other model years. Mostly reported between about 35,000 and 80,000 miles, often during rain or after the vehicle sits in wet weather.

   What to check: Cycle the wipers through every speed and the intermittent setting, and check that the washer pumps stop when released. Look for moisture or corrosion around the wiper module and cowl area, and ask whether the wiper module has been replaced.

   2 excerpts from owner complaints in NHTSA records

   “This is the 3rd time in the 5yrs I have owned this vehicle that we have lost control of the front windshield wipers during a rain storm in florida. We have replaced at our expense the wiper control module. This time being the shortest span of about a month before it gets damp and malfunctions. Wipers either work intermittent or not at all and this hampers visibility and can cause a wreck. I have noticed that GM had a recall for 2003 but not for other years. …”

   NHTSA complaint #10510519, filed 2013-05, 149,000 miles

   “The wipers would stop working in the front and start working on and off again they would still work on high setting but they would not turn off and the pump on the reservoir for the washing fluid would keep spraying even after all fluid was gone I had to pull out my fuse to keep it from spraying.trying to find out if this stuff is covered on recall or if I will have to pay to get it fixed or if I can please let me know I am not sure what all recalls need to be fixed but I would like to get them done before something bad happens .”

   NHTSA complaint #10568083, filed 2014-03, 53,000 miles
2. 2
   Electrical system

   Speedometer and gauges stick, jump, or quit

   • 12 complaints (15%)
   • median 49,588 mi at 6.7 yrs old (11 state mileage)
   • filed 2009–2021

   Owners report the speedometer freezing at zero, maxing out, or jumping erratically, with the tachometer and fuel gauge sometimes failing as well, leaving them unable to judge speed without a GPS. Complaints describe the problem as intermittent at first and then constant, occasionally starting after the engine warms up. Several say the dealer diagnosed the instrument cluster as needing replacement, and in some reports a body or sensing module was also implicated in the gauge and accessory failures. Reported from very low mileage up to about 140,000 miles, with many entries between 30,000 and 80,000 miles.

   What to check: Start the vehicle and watch the speedometer and tachometer sweep and settle, then drive at a steady speed and confirm the reading tracks. Ask whether the instrument cluster or any body control module has been repaired or replaced.

   2 excerpts from owner complaints in NHTSA records

   “While driving on I-81 near winchester, va., I noticed my speedometer moving erratically. I have not driven it much since this mishap. As of august 4, 2014 the mileage is only 55,264. I just noticed a suit filed against GM for this problem. I was never notified about any recall. Is there any recourse for me?”

   NHTSA complaint #10618748, filed 2014-08, 49,588 miles

   “While traveling on the main roads the speedometer intermittently malfunctions then drops to zero, whereas I'm literally unable to determine my speed this seems to occur when the engine warms up and I been driving for better than a half hour.”

   NHTSA complaint #11415074, filed 2021-05, 41,280 miles
3. 3
   Air bags

   Air bag warning light on; sensing module unavailable

   • 10 complaints (13%)
   • median 105,000 mi at 11.6 yrs old (8 state mileage, few)
   • 1 mention a crash, fire or injury
   • filed 2013–2018

   Owners describe the air bag service message and red warning lamp staying on, sometimes after rain or after water reached the driver-side floor where the sensing and diagnostic module sits. Complaints say the module was diagnosed as failed and, in one case, air bags did not deploy in a collision. Multiple owners report the specific module part is discontinued, so dealers and independent shops could not supply a replacement, and some link the moisture to clogged sunroof or roof drain tubes. Mostly reported between about 50,000 and 140,000 miles, often after wet weather or a period of rain.

   What to check: Confirm the air bag lamp comes on briefly at start-up and then goes out. Check the driver and passenger floor areas for dampness or water stains and ask whether the drain tubes and the sensing module have been inspected.

   2 excerpts from owner complaints in NHTSA records

   “A problem with nearly all Hummer h2s is roof leak, there is a drainage system to drain the water thru the vehicle. This clogs up periodically and the water drains into the vehicle and ends up on the front floorboard. The airbag sensor diagnostic module is mounted on the floorboard directly under the drivers seat. If this gets wet, which it does, the module is ruined and renders the airbags inoperable. This has happened to my vehicle and I am sure many others. …”

   NHTSA complaint #10859926, filed 2016-04, 130,000 miles

   “The sdm (sensing and diagnostic module) on my 2005 Hummer H2 is not working and is causing my air bags to not work, and also causes other modules to not be able to communicate and cause my gauges and other electrical accessories to not operate (windows, locks, etc.) many other Hummer H2 owners are having this same problem. A new sdm would fix the issue, but GM for some reason has discontinued manufacturing this module. Why would GM stop making a safety related item for vehicles that are only arould 10 years old with many still on the road. …”

   NHTSA complaint #10959060, filed 2017-03, 100,000 miles
4. 4
   Brakes

   Brake pedal soft or stiff; booster and lines

   • 11 complaints (14%)
   • median 80,483 mi at 10.3 yrs old (10 state mileage)
   • filed 2005–2023

   Owners report a brake pedal that sinks toward the floor, feels spongy, or becomes very stiff, sometimes with a whistling or squeaking noise and difficulty steering at the same time. Complaints describe hydraulic brake booster and accumulator failures, and separately, steel brake lines rusting through and leaking fluid. Some owners say a dealer or the manufacturer declined coverage because their vehicle identification number was not part of a related brake campaign; another says a dealer attributed a brake line failure to vehicle age. Spread from about 17,000 to 130,000 miles, with most reports between roughly 60,000 and 90,000 miles.

   Recall 05V0430004 related service bulletins

   What to check: Press and hold the brake pedal with the engine running to see whether it stays firm, and inspect the brake lines and booster area underneath for rust, weeping, or wet spots. Ask whether the brake booster has been replaced and whether any related campaign applies to the vehicle.

   2 excerpts from owner complaints in NHTSA records

   “Steel brake line burst due to corrosion and rust. Brake pedal went all the way to floor. Made call to GM and had vehicle towed to my local authorized GM service center. I was told that this was not covered because the vehicle was almost 10 years old and that this was the life expectancy of the vehicle.”

   NHTSA complaint #10618272, filed 2014-08, 82,000 miles

   “On february 3, 2015, I noticed my brakes pedal were going closer to the floor. I got home and noticed that my brake lines at the rear was leaking brake fluid onto my driveway. I attempted to pull the vehicle up further in the driveway and the brake pedal went all the way to the floor. I had to push in the emergency brake. On february the 7th I contacted my gmc dealer in wendell, nc. I advised them that I was getting aaa to tow my vehicle in due to brake line problems. …”

   NHTSA complaint #10703960, filed 2015-04, 79,467 miles
5. 5
   Steering

   Power steering hard to turn or leaking fluid

   • 9 complaints (11%)
   • median 81,500 mi at 10.9 yrs old (9 state mileage, few)
   • filed 2008–2026

   Owners describe the steering wheel becoming very hard to turn at speed, and in one case at a standstill while parking on dry pavement. Complaints mention fluid leaking onto the ground and, in some reports, power steering fluid reaching the hydro-boost brake assembly and affecting braking. Diagnoses in the complaints include the power steering pump, the power steering cooler, and the hydro-boost unit. Reported from very low mileage up to about 240,000 miles, with several entries between roughly 37,000 and 90,000 miles.

   Recall 05V0430003 related service bulletins

   What to check: Check the power steering fluid level and look for leaks at the pump, cooler, and lines, and ask whether any steering components have been replaced. Turn the wheel lock to lock while parked and listen for noise or resistance.

   2 excerpts from owner complaints in NHTSA records

   “The contact owns a 2005 Hummer H2. The contact stated that while making a turn with the brake pedal depressed, the power steering and brakes malfunctioned without any warnings. The contact was able to regain control of the vehicle. The vehicle was taken to a dealer, where it was diagnosed that the brake booster malfunctioned and need to be replaced. …”

   NHTSA complaint #10746913, filed 2015-08, 140,000 miles

   “The contact owns a 2005 Hummer H2. The contact stated that while driving approximately 65 MPH, the steering wheel became difficult to maneuver. The vehicle was towed to the dealer for diagnosis. The technician stated that the power steering cooler would have to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 37,000.”

   NHTSA complaint #10510843, filed 2013-05, 37,000 miles

Buying note. These reports cluster around water intrusion and electronics — wipers, gauges, and the air bag sensing module — so check drain tubes, floor areas, and the wiper and gauge behavior carefully on a test drive. Also budget for brake and steering work at higher mileage, and confirm the condition of the brake lines, booster, and power steering system.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.