2004 Chevrolet Trailblazer EXT Electrical System Problems
Owners have filed 145 complaints with NHTSA about electrical system problems on the 2004 Chevrolet Trailblazer EXT, 56% of all complaints for this model year. Half of the reports with a mileage happened before 63,000 miles. The words owners use most often: “oil pressure” (10% of reports).
- 145electrical system complaints
- 63,000median miles at failure
- 1mention a crash
- 1mention an injury
- 0related recalls
- $930typical repair cost reported by owners
- 48%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.
- Oil pressure: mentioned in 14 of 145 complaints (10%)
- Instrument cluster: mentioned in 13 of 145 complaints (9%)
- Fuel gauge: mentioned in 12 of 145 complaints (8%)
- Speedometer tachometer: mentioned in 8 of 145 complaints (6%)
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 2004 Chevrolet Trailblazer EXT at $930, and half of them between $770 and $1,100.
Based on 15 NHTSA complaints about this problem alone that state a repair bill or quote (2007–2011), 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 123 complaints that reported the odometer reading.
How serious are the reports?
Of 145 complaints, 1 mention a crash, 2 a fire, 1 an injury.
Chevrolet Trailblazer EXT electrical system complaints by model year
| Model year | Electrical System complaints | Share of that year | Median miles |
|---|---|---|---|
| 2006 Trailblazer EXT | 41 | 22% | 70,858 |
| 2004 Trailblazer EXT | 145 | 56% | 63,000 |
| 2003 Trailblazer EXT | 77 | 25% | 84,225 |
| 2002 Trailblazer EXT | 14 | 14% | 64,000 |
When owners reported it
Related recalls (0)
No safety recall lists electrical system for the 2004 Chevrolet Trailblazer EXT. 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.
Instrumental panel/ gage cluster. All gages continue to fail spiking all over the place prior to failing. Air bag light continues to blink on then off randomly
Fuel gauge not working alone with all the other gauges and turning signal not working
Tl* the contact owns a 2004 chevrolet trailblazer ext. The contact stated that the entire instrument panel failed to operate. In addition, the speedometer, tachometer, and fuel gauge failed to function properly. The vehicle was taken to an independent mechanic who stated that the instrument panel…
Frequently asked questions
Do all 2004 Chevrolet Trailblazer EXTs have electrical system problems?
No. NHTSA has 145 owner complaints about electrical system for the 2004 Chevrolet Trailblazer EXT (56% of the 261 complaints for this model year). Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the 2004 Chevrolet Trailblazer EXT electrical system?
No recall currently lists electrical system for this vehicle.
At what mileage do electrical system problems start?
The median reported mileage is 63,000 miles: half of the reports with a mileage came before that.
How much does it cost to fix electrical system problems on the 2004 Chevrolet Trailblazer EXT?
Owners report a typical cost of $930 (half paid between $770 and $1,100), from 15 complaints that state a repair bill or quote, in 2026 dollars.
What do owners say about electrical system problems on the 2004 Chevrolet Trailblazer EXT?
The most frequent phrase is “oil pressure”, in 14 of 145 complaints, followed by “instrument cluster” (13).
See all 2004 Chevrolet Trailblazer EXT problems or electrical system problems across all Trailblazer EXT years.