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Electrical systemPart report

2004 Chevrolet Trailblazer EXT 370 Electrical system Problems

Complaints
6about this part
Share
40%of 15 total for the year
Median mileage
100,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 6 complaints about the electrical system of the 2004 Chevrolet Trailblazer EXT 370, 40% of the 15 complaints for this model year. Where a mileage was given, the median is 100,000 miles.

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.

“On about 6 occasions over the past couple weeks my sunroof has opened by itself. On each occasion it has happened after backing up and then putting it in drive. When it happens I try to stop it by pressing the close button but it doesn't do anything and continues to open fully and stops. After about 20-30 seconds I can close it.”

NHTSA complaint #10460797, filed 2012-06, 111,000 miles

“My 2004 chevy trailblazer oil, gas and battery gauges have all stopped working. When I turn on my heated seats they smell like they're burning!! I have read 100's of complaints of similar stories with same problems. We need a recall, it is not safe!!!!!”

NHTSA complaint #10302293, filed 2010-01, 116,000 miles

“I parked the car in my driveway and the passenger side mirror started clicking. The mirror was attempting to rotate to the extreme car side of the mirror. Using the remote mirror control had no effect.the car was turned off and the mirror motor continued to try to move the mirror past the limit. After several minutes, the clicking stopped and there was an odor of plastic burning. After the clicking stopped, neither mirror moved. The local mechanic said the wiring to the motor had burned and shorted the mechanism. I was lucky that there was no damage to the interior of the door. …”

NHTSA complaint #10652929, filed 2014-11, 100,000 miles

“Switches for the power window and heated driver's seat on driver's door panel stopped working. Heater for driver's seat turns on, on its own and cannot be controlled with the switch. While the heater for driver's seat is on, the instrument panel flickers. The heater for driver's seat turns on and off, on its own and each time it comes on, the instrument panel flickers.”

NHTSA complaint #10447852, filed 2012-02, 40,000 miles

“I am extremely disappointment and afraid of my trailblazer at this point. We purchased the vehicle used and within a week of having the truck it started dying at redlights. Out of nowhere the truck just shuts off in the middle of the road. It has got to the point now that it does it while the vehicle is actually in motion. I have 3 kids and this is not safe! I lose total control of the vehicle. The headlight plug has burned up twice on the driver side and it has been replaced. …”

NHTSA complaint #10594004, filed 2014-05

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
2006531%
200510143%
2004640%
2003643%
2002233%

Other parts of the 2004 Chevrolet Trailblazer EXT 370

Fuel system
6 complaintsAir bags
1 complaintsBrakes
1 complaintsEngine cooling
1 complaintsExterior lighting
1 complaintsOther or unknown
1 complaintsSeats
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints

← All problems reported for the 2004 Chevrolet Trailblazer EXT 370

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 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