2004 Chevrolet Trailblazer Electrical System Problems
Owners have filed 627 complaints with NHTSA about electrical system problems on the 2004 Chevrolet Trailblazer, 58% of all complaints for this model year. Half of the reports with a mileage happened before 65,527 miles. The words owners use most often: “instrument cluster” (14% of reports).
- 627electrical system complaints
- 65,527median miles at failure
- 4mention a crash
- 5mention an injury
- 0related recalls
- $850typical repair cost reported by owners
- 56%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.
- Instrument cluster: mentioned in 89 of 627 complaints (14%)
- Oil pressure: mentioned in 42 of 627 complaints (7%)
- Gas gauge: mentioned in 38 of 627 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 at $850, and half of them between $760 and $1,050.
Based on 68 NHTSA complaints about this problem alone that state a repair bill or quote (2005–2019), 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 535 complaints that reported the odometer reading.
How serious are the reports?
Of 627 complaints, 4 mention a crash, 14 a fire, 5 an injury.
Chevrolet Trailblazer electrical system complaints by model year
| Model year | Electrical System complaints | Share of that year | Median miles |
|---|---|---|---|
| 2026 Trailblazer | 4 | 36% | 20,000 |
| 2025 Trailblazer | 14 | 56% | 36,800 |
| 2024 Trailblazer | 11 | 33% | — |
| 2023 Trailblazer | 16 | 23% | 49,000 |
| 2022 Trailblazer | 31 | 28% | 44,000 |
| 2021 Trailblazer | 41 | 21% | 12,500 |
| 2009 Trailblazer | 9 | 33% | 80,000 |
| 2008 Trailblazer | 65 | 34% | 76,000 |
| 2007 Trailblazer | 200 | 27% | 77,000 |
| 2006 Trailblazer | 251 | 23% | 89,000 |
| 2005 Trailblazer | 617 | 42% | 70,000 |
| 2004 Trailblazer | 627 | 58% | 65,527 |
| 2003 Trailblazer | 285 | 32% | 80,000 |
| 2002 Trailblazer | 181 | 16% | 70,500 |
| 2001 Trailblazer | 2 | 10% | 148,937 |
| 2000 Trailblazer | 1 | 4% | 131,000 |
When owners reported it
Related recalls (0)
No safety recall lists electrical system for the 2004 Chevrolet Trailblazer. 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.
Electronic throttle body? No throttle control, motor will only idle, turn ignition switch off, then restart it will run. Reduced Engine Power light comes on. Happens for no apparent reason. Very unsafe situation.
My clusterboard is completely non functioning the readings are not working
As you come to a complete stop or go under 5 mph, the vehicle's oil gauge will go all the way down. Once you accelerate, the oil gauge goes back to normal. When pumping gas into the vehicle, the gas pump will reset as if the gas tank is full but the gauge shows it's half empty. *tr
Frequently asked questions
Do all 2004 Chevrolet Trailblazers have electrical system problems?
No. NHTSA has 627 owner complaints about electrical system for the 2004 Chevrolet Trailblazer (58% of the 1,081 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 electrical system?
No recall currently lists electrical system for this vehicle.
At what mileage do electrical system problems start?
The median reported mileage is 65,527 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?
Owners report a typical cost of $850 (half paid between $760 and $1,050), from 68 complaints that state a repair bill or quote, in 2026 dollars.
What do owners say about electrical system problems on the 2004 Chevrolet Trailblazer?
The most frequent phrase is “instrument cluster”, in 89 of 627 complaints, followed by “oil pressure” (42).
Other 2004 Chevrolet Trailblazer problems
See all 2004 Chevrolet Trailblazer problems or electrical system problems across all Trailblazer years.