NHTSA lists 2 safety recalls and 1,368 owner complaints for the 2004 Chevrolet Trailblazer. Most complaints involve electrical system (780) and fuel system, gasoline (125). The EPA rates it 16 mpg combined.
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.
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.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Complaints for each Trailblazer model year we’ve synced.
| Model year | NHTSA complaints |
|---|---|
| 2002 | 1,277 |
| 2003 | 1,266 |
| 2004 | 1,368 |
| 2005 | 1,734 |
| 2006 | 1,347 |
| 2007 | 782 |
| 2008 | 195 |
| 2009 | 28 |
| 2021 | 196 |
| 2022 | 112 |
| 2023 | 73 |
| 2024 | 36 |
| 2025 | 27 |
| 2026 | 12 |
“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.”
“TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THE HE NOTICED A FUEL ODOR EMITTING FROM UNDERNEATH THE DRIVER'S SIDE OF THE VEHICLE. THE CONTACT ALSO STATED THAT THE FUEL MILEAGE HAD ALSO DECREASED WHEN DRIVING THE VEHICLE. THE CONTACT TOOK THE VEHICLE TO HAVE AN EVAP SMOKE TEST PERFORMED ON HIS VEHICLE. THE RESULT OF THE TEST DISCOVERED THAT A CRACK HAD FORMED ON THE FUEL NECK THAT CONNECTS TO THE FUEL TANK, WHICH WAS THE CAUSE OF THE FAILURE. THE CONTACT THEN SPOKE WITH J.B.A. CHEVROLET (7327 RITCHIE HWY, GLEN BURNIE, MD 21061) WHERE HE WAS INFORMED THAT THERE WERE NO RECALLS ON THE VEHICLE FOR THE FAILURE. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 126,432.”
“The contact owns a 2004 Chevrolet Trailblazer. The contact stated while driving at various speeds, the headlights became inoperable. After a while, the headlights became operational. There were no warning lights illuminated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The approximate failure mileage was 189,000.”
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| TrailBlazer 2WD Auto 4-spd, 6 cyl, 4.2 L · Rear-Wheel Drive | 14 | 19 | 16 | $3,900 | 555 |
| TrailBlazer 4WD Auto 4-spd, 6 cyl, 4.2 L · 4-Wheel or All-Wheel Drive | 14 | 19 | 16 | $3,900 | 555 |
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
2 safety recalls as of Nov 10, 2026, according to NHTSA. Recall repairs are free at a dealer. Check your VIN to see whether your car is included and whether the repair was done.
Owners filed 1,368 complaints with NHTSA. The most-cited components are electrical system (780), fuel system, gasoline (125), exterior lighting (116). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 2004 Chevrolet Trailblazer at 16 mpg combined, depending on engine and drivetrain (2 versions rated).