NHTSA lists 8 safety recalls and 1,266 owner complaints for the 2003 Chevrolet Trailblazer. Most complaints involve electrical system (382) and fuel system, gasoline (199). The EPA rates it 15–16 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.
CERTAIN SPORT UTILITY VEHICLES HAVE WINDSHIELD WIPER SYSTEMS THAT WILL NOT TURN ON, CEASE OPERATION WHILE IN USE, FAIL TO TURN OFF/ON BY THEMSELVES (MOISTURE SENSITIVE WIPER SYSTEM), OR HAVE CONTINUOUS WINDSHIELD WASHER PUMP OPERATION BECAUSE THE PRESENCE OF WATER WITHIN THE WIPER MODULES CAN EITHER CAUSE A SHORT CIRCUIT OR CAN LEAD TO THE CORROSION OF COMPONENTS WITHIN THE MODULE.
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 | 201 |
| 2022 | 113 |
| 2023 | 75 |
| 2024 | 36 |
| 2025 | 27 |
| 2026 | 12 |
“Transmission doesn’t have 3rd or 4th gear. Vehicle was smoking under hood. Found out after buying it it has flood damage. Mechanic said there was water in the transmission when inspected. Vehicle needs catylic converter sensor and vehicle has bad ground wire. Seller didn’t inform me of any of these issues and he said it was in good shape and very reliable.”
“ON 12/15/15 I DROPPED OFF MY 2003 CHEVY TRAILBLAZER BASED ON A BULLETIN THAT I RECEIVED FROM CHEVY - GM SPECIAL COVERAGE PROGRAM #14423. THERE WAS A SMELL OF FUEL WHILE REFUELING. ON 12/16/15 THE DEALERSHIP NOTIFIED ME THAT THE FUEL TANK WAS INDEED DEFECTIVE AND THAT IT NEEDED TO BE REPLACED. THEY SAID THAT THEY WOULD ORDER THE PART AND HOLD THE VEHICLE UNTIL THE PART CAME IN SINCE THE VEHICLE WAS NOT SAFE TO DRIVE. LATER THAT DAY THE DEALERSHIP STATED THE PART WOULD NOT BE AVAILABLE UNTIL THE MIDDLE OF FEB.2016 AND THAT I WOULD HAVE TO LEAVE THE VEHICLE IN THEIR LOT. THAT WAS EXTREMELY UPSETTING NEWS SINCE NOW I WAS NOT GOING TO HAVE MY VEHICLE FOR SEVERAL MONTHS WITHOUT A REPLACEMENT. I HAVE BEEN IN TOUCH WITH THE DEALERSHIP ([XXX] (SERVICE ADVISOR), [XXX] (PARTS MANAGER), [XXX] (SERVICE DIRECTOR), AND [XXX] , (PARTS DEPT. SUPERVISOR) AS WELL AS CHEVY CUSTOMER SERVICE (CASE # [XXX]). TODAY IS MARCH 4, 2016 AND THE PART IS STILL NOT AVAILABLE. I HAVE BEEN WITH OUT MY TRAILBLAZER FOR ALMOST 3 MONTHS. THE DEALERSHIP AND CHEVY CUSTOMER SERVICE STILL HAVE "NO IDEA" WHEN THE PART WILL BE AVAILABLE. THEY NOW TELL ME MAYBE MAY 2016. CAN YOU HELP EXPEDITE THIS CASE…”
“While driving my Trailblazer in A4WD on slippery road conditions, I went to pulled out of a parking lot and there was a loud sound like my whole front end fell out and the front end completely locked up. Almost causing an accident. I had to dial back to 2HI quickly to unlock to front end. There was no light indicating any problems. Been driving it 2HI since with out any problems. Still no service light or anything, but feels like I'm stuck in A4WD. Feels like there is a drag and a pulling to the right. Also using more gas since. It was a scary, afraid to try the 4x4 functions again. Another snow storm is on the way!”
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 | 20 | 16 | $3,900 | 555 |
| TrailBlazer 4WD Auto 4-spd, 6 cyl, 4.2 L · 4-Wheel or All-Wheel Drive | 13 | 19 | 15 | $4,150 | 592 |
| 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 |
8 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 1,266 complaints with NHTSA. The most-cited components are electrical system (382), fuel system, gasoline (199), power train (153). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 2003 Chevrolet Trailblazer at 15–16 mpg combined, depending on engine and drivetrain (2 versions rated).