2004 Hummer H2 Brakes Problems
- Complaints
- 14about this part
- Share
- 24%of 59 total for the year
- Median mileage
- 73,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 14 complaints about the brakes of the 2004 Hummer H2, 24% of the 59 complaints for this model year. Where a mileage was given, the median is 73,500 miles. 2 of these say a crash was involved and 1 a fire, according to the filers. 2 recall campaigns on record are filed under a similar system.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I was traveling on nj turnpike when my brakes didn't feel right. Almost no brakes stepping to floor. Then brake failure light came on. This is a garage kept vehicle with approx 14000 original miles. Appears brake lines are corroded. One owner. How could this happen. Is there a recall how can I obtain details for full recovery or reimbursement?”
NHTSA complaint #10560687, filed 2014-01, 14,000 miles“I was pulling out of my driveway in my Hummer H2 when the brake pedal went to the floor. I got out of my H2 and noticed a large amount of brake fluid running out from under the rear end near the left rear wheel. I looked under the vehicle and noticed a brake line was rusted in two. I checked under the hood and saw that the brake fluid reservoir was completely empty.”
NHTSA complaint #10649650, filed 2014-10, 83,014 miles“My 2004 H2 has a serious rusting issue with the brake lines. On 2 separate occasions I have been driving along at approximately 30 mpg and hit the brakes only to have them go all the way to the floor. Luckily I did not an accident. In both occasions the line burst due to rust. My veh. Has 103,000.00 lightly driven. Gm needs to come out and admit they have a problem with rusting brake liens before someone gets killed”
NHTSA complaint #11013344, filed 2017-08, 103,000 miles“As I was driving on I 5 in oregon I experienced a complete failure of the electrical system and brake systems. The vehicle was on cruise control and when I disengaged it all of the safety warning light appeared on the dashboard. I pressed on the brakes and they were a complete failure also. At this time the dashboard lights and controls went off and I loss power. I was able to get to the side of the road when I noticed smoke coming from under the hood. I got my daughter out of the vehicle to a safe distance and opened the hood and the main fuse relay panel was fully engulfed in fire. …”
NHTSA complaint #11022893, filed 2017-09, 111,644 miles“Extremely excessive rust on underbody of my 2004 Hummer H2. Brake lines, calipers, rotors, frame, suspension, etc have holes. My brakes completely failed on the highway and I crashed into a truck and a SUV. Luckily used the emergency brake to eventually stop it. Dealer says entire brake system needs to be replaced and the frame is also in bad shape. I did report the rust problem to GM while under the 3 year warranty but they did nothing. I neither do any cross-country driving nor am near the ocean. I am scared of driving the vehicle.”
NHTSA complaint #10348662, filed 2010-08, 11,000 milesRelated recalls
- 05V043000Feb 8, 2005Certain trucks, sport utility vehicles, and vans equipped with bosch hydro-boost brake assemblies, the hydraulic brake booster pressure accumulator may crack…Covers: Hummer H2 2004–2005, Chevrolet Silverado 2004–2005, GMC Savana 2004–2005 +7 more
- 04V045000Feb 4, 2004Certain sport utility vehicles, pickup trucks, and passenger vans fail to comply with the requirements of federal motor vehicle safety standard no. 135…Covers: Hummer H2 2003–2004, Chevrolet Silverado 2003–2004, GMC Yukon 2003–2004 +10 more
Related service bulletins
- 10242252Aug 18, 2023This technical bulletin provides information and a solution to a condition of Brake Pedal Moves or Self Applies at Full Turns.
- 10226382Oct 18, 2022This Preliminary Information communication advises the technician that the Hydro-Boost is not serviceable and will need to be replaced if the brake pedal moves or applies on its…
- 10208027Jan 14, 2022This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester…
- 10178353Jun 26, 2020This Preliminary Information communication advises the technician that the Hydro-Boost is not serviceable and will need to be replaced if the brake pedal moves or applies on its…
- 10168960Nov 12, 2019This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire…
- 10162149Jun 24, 2019This Preliminary Information communication advises the technician that the Hydro-Boost is not serviceable and will need to be replaced if the brake pedal moves or applies on its…
- 10161004May 13, 2019This Preliminary Information communication advises the technician that the Hydro-Boost is not serviceable and will need to be replaced if the brake pedal moves or applies on its…
- 10129088Jan 23, 2018This Preliminary Information communication advises the technician that the Hydro-Boost is not serviceable and will need to be replaced if the brake pedal moves or applies on its…
- 10113364Jan 31, 2017This Preliminary Information communication advises the technician that the Hydro-Boost is not serviceable and will need to be replaced if the brake pedal moves or applies on its…
- 10078876May 11, 2016This preliminary information communication advises the technician that the hydro-boost is not serviceable and will need to be replaced if the brake pedal moves or applies on its…
Brakes: other model years
Other parts of the 2004 Hummer H2
14 complaintsVisibility (wipers, defrost, mirrors)
13 complaintsSteering
6 complaintsAir bags
3 complaintsBody and structure
3 complaintsSuspension
3 complaintsElectronic stability control
2 complaintsEngine
2 complaintsOther or unknown
2 complaintsTransmission and drivetrain
2 complaintsEngine cooling
1 complaintsEquipment
1 complaints
← All problems reported for the 2004 Hummer H2
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology