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Electrical systemPart report

2008 Hummer H3 Electrical system Problems

Complaints
34about this part
Share
30%of 113 total for the year
Median mileage
80,000miles
Trend
StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.

NHTSA recorded 34 complaints about the electrical system of the 2008 Hummer H3, 30% of the 113 complaints for this model year. Where a mileage was given, the median is 80,000 miles. 1 of these say a crash was involved and 4 a fire, according to the filers.

Example complaints

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

“When attempting to start the vehicle, it locks me out for 10 min, I had it happen two times in a row where I couldn't start it for 20 minutes and was late for work. I have been suck in -20 degree weather with my child. This is an on going issue, and there isn't an error code that pops up when I had it checked. This needs to be fixed!! There is no way to tell when it is going to happen, therefore it has made it very unreliable and has put me and my family at risk.”

NHTSA complaint #11342985, filed 2020-08, 109,000 miles

“I was driving along and there was smoke coming from below passenger side under the glove box. Pull over and saw it was a resistor with two screws. It was burnt, I unplugged and drove home. Then searched internet and there are hundreds of people with the same problem. This needs to be a recall asap, before someone dies in a fire.”

NHTSA complaint #10592207, filed 2014-05, 71,000 miles

“Security system stops it from cranking and I have to stand outside the vehicle with it locked for 15 minutes so it will reset. Wiring burnt up and I had it replaced and the radio, A/C, and temp gauge still doesn't work”

NHTSA complaint #11363717, filed 2020-10, 124,000 miles

“I looked on the internet to find out why my heater blower was not working and there were lots of complaints about the wiring harness and resistor burning out. I checked mine and sure enough mine was burnt on the wiring harness all the way through the plastic. Gm needs to figure out why it would cause it to malfunction like that cause it could cause a fire.”

NHTSA complaint #10483371, filed 2012-11, 78,000 miles

“I was cut off by another driver in rush hour traffic and the horn failed to operate when pressed. After this incident, I discovered that the horn does not work after the vehicle is driven every few miles! The vehicle was in the shop for hours of diagnosis, and finally it was discovered by the technician that the vehicle has a bad sir coil . The sir coil is on special order.”

NHTSA complaint #10246668, filed 2008-10, 3,363 miles

Related service bulletins

Electrical system: other model years

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

Other parts of the 2008 Hummer H3

Visibility (wipers, defrost, mirrors)
27 complaintsEngine
18 complaintsAir bags
17 complaintsOther or unknown
9 complaintsBody and structure
8 complaintsSteering
5 complaintsBrakes
4 complaintsEngine cooling
4 complaintsEquipment
4 complaintsFuel system
4 complaintsSuspension
4 complaintsExterior lighting
3 complaints

← All problems reported for the 2008 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