2003 Hummer H2 Electrical system Problems
- Complaints
- 24about this part
- Share
- 17%of 141 total for the year
- Median mileage
- 55,894miles
- Trend
- FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
NHTSA recorded 24 complaints about the electrical system of the 2003 Hummer H2, 17% of the 141 complaints for this model year. Where a mileage was given, the median is 55,894 miles. 1 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I went to crank up my Hummer to warm it up due to the very cold weather once I cranked the Hummer I immediately smelled a very strong burning odor. It begin to smoke and my husband yelled it your truck and I looked and saw the smoke getting worse and thicker. I unhooked my infant son's car seat belt and took him out of the vehicle. …”
NHTSA complaint #10683658, filed 2015-02, 97,000 miles“We have a 2003 Hummer H2- the resistor for the blower motor is no longer made. This is a safety issue since it can limit visibility due to failure to clear the windshield. This is a safety hazard. We have contacted GM with no results. This is not the only vehicle that has this particular part. This is a very serious issue since it can limit the visibility and can cause a fatal crash. Please advise.”
NHTSA complaint #10670272, filed 2015-01, 103,000 miles“Key stuck in ignition. Fortunately we arrived home before this happened, but when we got home we could not remove the key from the ignition. We had to leave it in the ignition, which ran the battery down by the next morning. We have had to disconnect the battery to keep it from running down, and have been unable to remove the key from the ignition - wd40 did not work, jiggling the key, steering wheel or shifter also did not work.”
NHTSA complaint #10557551, filed 2013-12, 43,000 miles“The pass lock keeps my vehicle from starting and stopping it at random, and has been doing this for years. Seems to happen to at least 85% of hummers out there if you check around, Hummer forum and other places. This is very serious. Stops at intersections, and could on railroad tracks. I know that you've had complaints about this for years and ignored them, saying that you haven't had other complaints. This should be addressed by your agency, as your job is to keep the citizens safe. Not pass them off as you've been doing for years on this issue with the GM pass lock system. …”
NHTSA complaint #11398236, filed 2021-02, 32,000 miles“I've had a problem with my instrument panel cluster. My speedometer doesn't read any MPH. I can't determine how fast I'm going. Apparently, GM doesn't cover that, because there hasn't been any recalls ont that. I'm paying out of pocket today to get it fixed”
NHTSA complaint #10381941, filed 2011-01, 65,000 milesRelated service bulletins
- 11009156Oct 25, 2024This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester…
- 11006621Aug 26, 2024Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which…
- 11002312Jun 6, 2024This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414…
- 10252735Mar 28, 2024This bulletin provides information for electrical ground repairs using new General Motors replacement fasteners with conductive finish.
- 10244214Sep 21, 2023This informational bulletin provides information for the IPC odometer programming method quick reference guide.
- 10237671May 19, 2023This 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…
- 10230605Jan 6, 2023This service bulletin provides information for dealers/technicians on OnStar Module 2G Sunset Information.
- 10189005Dec 7, 2020This SKU is a Climate Control Module. The customer communication requested return of unsold inventory to inspect for a software issue. If the software issue exists it can cause a…
- 10176649May 20, 2020This informational bulletin provides information for the IPC odometer programming method quick reference guide.
- 10171318Jan 31, 2020This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester…
Electrical system: other model years
Other parts of the 2003 Hummer H2
52 complaintsBrakes
18 complaintsSteering
17 complaintsBody and structure
13 complaintsSuspension
11 complaintsTransmission and drivetrain
11 complaintsEngine cooling
5 complaintsSeats
5 complaintsWheels
5 complaintsEngine
4 complaintsVehicle speed control
3 complaintsFuel system
2 complaints
← All problems reported for the 2003 Hummer H2
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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