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Electrical systemPart report

2006 Hummer H3 Electrical system Problems

Complaints
96about this part
Share
27%of 361 total for the year
Median mileage
89,000miles
Trend
FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.

NHTSA recorded 96 complaints about the electrical system of the 2006 Hummer H3, 27% of the 361 complaints for this model year. Where a mileage was given, the median is 89,000 miles. 19 a fire, according to the filers.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“Truck will not start for no apparent reason. Key turns, sounds like it will start but does not. This has happened on several occasions and seems to be an ongoing problem for other Hummer owners too. I just had it towed once again to the mechanics shop. This is the 5th time within one year. Unable to leave my house during an emergency, child related.”

NHTSA complaint #10995755, filed 2017-06, 115,000 miles

“The ventilation system stopping blowing air. I went online and did some research about this and found that many others had the same complaint and how to diagnose it. I opened up the area under the glove compartment and found that a resistor was burnt up. This appears it could have been a very dangerous situation if it had caught fire.”

NHTSA complaint #10543785, filed 2013-09, 80,000 miles

“I was traveling to work on a residential street at 5am when I noticed a smell and saw a glow coming from under my dashboard. When I could stop I noticed it was a fire. The fire did put itself out but the fire department was called and they advised me not to driver the vehicle. I did report this to GM and they advised me they could not help me with the repairs and there is currently not a recall.”

NHTSA complaint #10573922, filed 2014-03, 120,000 miles

“I have a 2006 Hummer H3, every few weeks or so the motor will turn over but will not start. I let it sit for a while and then it will start. I have taken it to both the dealer and another mechanic but neither can find anything wrong with it. About 6 months ago, I got a new battery thinking that would solve the issue but it has not.”

NHTSA complaint #10396621, filed 2011-04, 79,000 miles

“Car has been spontaneously stalling while driving at high speeds. Engine cuts out, power brakes and steering fail, no radio, etc. Vehicle loses all power. It is terrifying. Has happened at least 3 dozen times now. Several visits to dealer could not pinpoint problem. Dealers unable to duplicate stalling, although it has happened to me regularly for months - ie, every time I drive the car (with my two babies) for an extended period on the highway.”

NHTSA complaint #10568195, filed 2014-03, 89,000 miles

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
2010457%
20093449%
20083430%
20077632%
20069627%

Other parts of the 2006 Hummer H3

Visibility (wipers, defrost, mirrors)
59 complaintsEngine
52 complaintsBody and structure
36 complaintsEngine cooling
35 complaintsOther or unknown
29 complaintsSuspension
29 complaintsAir bags
20 complaintsBrakes
20 complaintsTransmission and drivetrain
20 complaintsLatches, locks and linkages
11 complaintsSteering
11 complaintsFuel system
10 complaints

← All problems reported for the 2006 Hummer H3

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 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