Chevrolet Trailblazer EXT 370 Electrical System Problems
Owners have filed 120 complaints with NHTSA about electrical system problems on the Chevrolet Trailblazer EXT 370 across 5 model years. The 2005 model year has the most (101). The words owners use most often: “fuel gauge” (14% of reports).
- 120electrical system complaints
- —median miles at failure
- 2mention a crash
- 1mention an injury
- 0related recalls
- $690typical repair cost reported by owners
- 58%of reports with a speed happened at 50+ mph
What owners describe
Phrases that appear unusually often in these complaints compared with complaints about other cars.
- Fuel gauge: mentioned in 17 of 120 complaints (14%)
- Oil pressure: mentioned in 9 of 120 complaints (8%)
- Speedometer quit: mentioned in 8 of 120 complaints (7%)
How much does it cost to fix?
Owners who wrote down what they paid or were quoted put the typical electrical system repair on the Chevrolet Trailblazer EXT 370 at $690, and half of them between $600 and $740.
Based on 11 NHTSA complaints about this problem alone that state a repair bill or quote (2008–2011), converted to 2026 dollars with the U.S. consumer price index. These are owners' own figures, not a quote: they include dealer quotes, and owners who file complaints often faced larger repairs, so they can run higher than typical shop prices. Prices vary by shop, region and warranty coverage. How we calculate this.
At what mileage do electrical system problems happen?
Based on 107 complaints that reported the odometer reading.
How serious are the reports?
Of 120 complaints, 2 mention a crash, 3 a fire, 1 an injury.
Chevrolet Trailblazer EXT 370 electrical system complaints by model year
| Model year | Electrical System complaints | Share of that year | Median miles |
|---|---|---|---|
| 2006 Trailblazer EXT 370 | 5 | 31% | 71,800 |
| 2005 Trailblazer EXT 370 | 101 | 43% | 73,000 |
| 2004 Trailblazer EXT 370 | 6 | 40% | 100,000 |
| 2003 Trailblazer EXT 370 | 6 | 43% | 140,000 |
| 2002 Trailblazer EXT 370 | 2 | 33% | 162,000 |
When owners reported it
Related recalls (0)
No safety recall lists electrical system for the Chevrolet Trailblazer EXT 370. A pattern of complaints does not always lead to a recall.
What owners report
Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.
The whole instrument cluster does not work anymore, does not let me know how fast i'm going or how much fuel i have, oil pressure gauge doesn't work, temperature gauge doesn't work... Why hasn't this been recalled? This is very dangerous, considering i have 4 kids that are constantly in the car…
I have 2005 chevrolet trailblazer 4wd ext ls 4.2 liter. I noticed over past 3 years that i be at drive through for burgers and etc. The car would cut off. I did not think much of it at the time. It has gotten critically worse. It would cut off in middle of the highway, drive throughs and etc…
For the 3rd time the cluster has gone out. This results in the speedometer, temperature gauge and others to stop working. Each time i am expected to take my vehicle to a chevrolet mechanic for diagnosis and part replacement at $700.00+ each time. This model has no recall. I am fed up with paying…
I was driving on the and right in the middle of traffic and the car just shut off . I try to restart and it start up when i try to proceed it shut off and would not start back up at all.
2003 chevrolet trailblazer 370 rear passenger side door electrical window control switch would not completely close window . Smelled like electrical wire burning. Had vehicle stop at time and had assistance in removing door interior panel and found electrical window switch completely melted and…
Frequently asked questions
Do all Chevrolet Trailblazer EXT 370s have electrical system problems?
No. NHTSA has 120 owner complaints about electrical system for the Chevrolet Trailblazer EXT 370. Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the Chevrolet Trailblazer EXT 370 electrical system?
No recall currently lists electrical system for this vehicle.
How much does it cost to fix electrical system problems on the Chevrolet Trailblazer EXT 370?
Owners report a typical cost of $690 (half paid between $600 and $740), from 11 complaints that state a repair bill or quote, in 2026 dollars.
What do owners say about electrical system problems on the Chevrolet Trailblazer EXT 370?
The most frequent phrase is “fuel gauge”, in 17 of 120 complaints, followed by “oil pressure” (9).