Is the 2004 Chevrolet Trailblazer a bad year?
1,081 owner complaints to NHTSA. Engine and transmission complaints are in line with other Trailblazer years.
Keep it
Engine and transmission complaints for the 2004 Chevrolet Trailblazer are in line with other Trailblazer years. Electrical system, fuel system and exterior lighting stand out for this year: see below.
The verdict moves with mileage: the same car reads differently at 30,000 and at 150,000 miles.
What 2004 Trailblazer owners report, by mileage
Each system owners named in five or more complaints, with the mileage range where the middle half of those complaints were filed. Read at 66,000 miles.
| SYSTEM | COMPLAINTS | MIDDLE HALF FILED AT | TYPICAL US REPAIR BILLS |
|---|---|---|---|
| Electrical systemSTANDS OUT | 627 (58%) | 50k–87k miles · around this mileage | 12-volt battery replacement $100–$400 · Starter motor replacement $350–$1,200 |
| Fuel systemSTANDS OUT | 148 (14%) | 55k–114k miles · around this mileage | Fuel pump replacement $220–$1,500 · Fuel injector replacement (one injector) $300–$1,200 |
| Exterior lightingSTANDS OUT | 101 (9%) | 68k–118k miles · ahead | — |
| Transmission and drivetrain | 62 (6%) | 36k–101k miles · around this mileage | CV axle / CV joint replacement (one side) $300–$1,500 · Automatic transmission replacement $2,500–$7,000 |
| Engine | 47 (4%) | 28k–88k miles · around this mileage | Valve cover gasket replacement $110–$500 · Timing chain replacement $1,000–$4,000 |
| Air bags | 42 (4%) | 30k–107k miles · around this mileage | — |
| Speed control | 38 (4%) | 44k–77k miles · around this mileage | — |
| Visibility and wipers | 31 (3%) | 28k–90k miles · around this mileage | — |
| Brakes | 24 (2%) | 31k–75k miles · around this mileage | Brake pad replacement (one axle) $115–$390 · Brake pads and rotors replacement (one axle) $200–$1,084 |
| Body structure | 23 (2%) | 32k–123k miles · around this mileage | — |
| Equipment | 17 (2%) | 27k–79k miles · around this mileage | — |
| Suspension | 14 (1%) | 28k–106k miles · around this mileage | Ball joint replacement (one joint) $200–$500 · Control arm replacement (one arm) $200–$900 |
| Steering | 13 (1%) | 20k–109k miles · around this mileage | Steering rack and pinion replacement $700–$2,100 |
| Tires | 13 (1%) | 26k–89k miles · around this mileage | — |
Bills are typical US ranges from the sources named in the tool (J.D. Power, Kelley Blue Book, CarParts.com and others), printed only for systems that stand out or sit at or ahead of 66,000 miles. Not a quote.
What owners reported alongside their complaints
Of 1,081 complaints: 56 mention a crash · 31 mention a fire · 47 report an injury · 5 say the car was towed.
No complaints in the last 12 months; the newest was filed in Aug 2025.
Counts of what owners wrote in their complaints, not verified by anyone.
In owners' own words
I have a 2004 Chevrolet trailblazer SUV 4WD with 61000 miles on it and have lost reverse on it. My mechanic took it apart and found some pieces had broke and it will have to be rebuilt or replaced.
Transfer case failure; lost 4 wd while driving on ice in alaska. T-case failure occurred at 36k miles. When case was opened, interior components were completely disintegrated.
Transmission cooler line corroded and began leaking next to exhaust manifold which could have resulted in a fire.
Unedited excerpts from complaints filed with NHTSA, chosen by mileage (nearest 66,000 miles), not by content. Unverified.
Recalls for the 2004 Chevrolet Trailblazer: 2
On certain trucks and sport utility vehicles, the driver wishing to signal a turn by moving the directional signal lever, (Up or down) may cause the front marker/turn lights and rear turn lights to flash in a manner similar to hazard warning, rather than flashing on the desired side only. The driver may not be able to clearly signal their intentions to turn, change travel lanes, or potentially warn others of an impaired vehicle operating condition increasing the risk of a crash.
On certain sport utility vehicles, vibration and heat may cause the tail lamp/stop lamp bulb to loosen in its socket. If this occurs, the bulb may flicker and eventually become inoperative. An inoperative brake lamp will not convey the driver's intention of stopping to drivers in following vehicles, and an inoperative rear turn signal lamp will not convey the driver's intention to turn to drivers in following vehicles.
A recall may cover only some cars of a model year; the campaign size counts every model and year it lists. Enter your VIN at nhtsa.gov/recalls: dealers fix open recalls free.
Service bulletins from Chevrolet: 159
Repair instructions Chevrolet sent its dealers for symptoms seen in the shop on the 2004 Chevrolet Trailblazer. Ask a dealer or mechanic for a bulletin by its number.
Rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up
Possible location of an internal coolant leak from a specific cylinder head and location
Guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system
Proper way to install the pistons in an engine
NHTSA defect investigations: 4
Loss of Headlights
Fuel pump module leaks gasoline
Brake lamp failure
Brake lamp failure
Neighbouring years
2003 Trailblazer: 901 complaints, keep it · 2005 Trailblazer: 1,465 complaints, keep it.
Every Chevrolet Trailblazer year
2000 · 2001 · 2002 · 2003 · 2004 · 2005 · 2006 · 2007 · 2008 · 2009 · 2014 · 2021 · 2022 · 2023 · 2024 · 2025 · 2026 · All Trailblazer years side by side
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Questions
Is the 2004 Chevrolet Trailblazer a bad year?
1,081 owner complaints to NHTSA. Engine and transmission complaints are in line with other Trailblazer years. At 66,000 miles the tool says: Keep it.
What are the most common problems with the 2004 Chevrolet Trailblazer?
By owner complaints to NHTSA: electrical system (627), fuel system (148), exterior lighting (101), transmission and drivetrain (62), engine (47).
How many recalls does the 2004 Chevrolet Trailblazer have?
2 recall campaigns list this model year: Exterior lighting (NHTSA 05V-198), Exterior lighting (NHTSA 04V-527). A recall may cover only some cars; check by VIN at nhtsa.gov/recalls.
Method: counts of unverified owner complaints filed with NHTSA, compared only with other years of the same model (sales volumes are unknown, so no failure rate is computed). A system stands out at 40+ complaints and at least twice the model's quiet (lower-quartile) year, or twice the share across every vehicle of that model year. The mileage range is the 25th to 75th percentile of the mileages owners reported. Data received by NHTSA through November 5, 2026. Repair prices are typical US ranges from named sources, not quotes. Not a diagnosis and not financial advice. PulsCar is not affiliated with NHTSA. Check this car at your own mileage.