Most common 2003 Chevrolet Trailblazer 360 problems
Share of the 11 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Chevrolet Trailblazer 360 complaints by model year
Best Trailblazer 360 years: 2002, 2003, 2004. Years to avoid: 2007, 2006, 2005. Compare all years →
NHTSA defect investigations
Federal safety investigators have looked into 2 possible defects involving the 2003 Chevrolet Trailblazer 360:
Fuel pump module leaks gasoline
Odi has received reports that the fuel pump module leaks fuel and or vapor underneath the vehicle.GM states, the failure mechanism is corrosion of the fuel pump module flange which May lead to a fuel leak.corrosion of the fuel pump module flange is the result of the vehicle operating in a corrosive environment.odi has upgraded this pe to engineering analysis (ea07-009) to further assess this issue.
Fuel pump module leaks gasoline
During the course of this ea investigation, odi observed that the majority of the complaints (88%) and warranty claims (94%) were reported for vehicles that are registered for use in the salt belt region of the us.this area includes 20 states in the northeast, mid atlantic and the midwest regions and the district of columbia.consumers in the salt belt region reported to odi that they could smell fuel vapors in their…
What 2003 Chevrolet Trailblazer 360 owners say
Electrical system
Shut off vehicle , got out of drivers side. Shut door and as I closed door all my locks on door locked down. My grandaughter was strapped into a car seat in the back seat and we were unable to open doors to get her out. We had to contact police and they were unable to get doors to unlock. The locks would not work the windows would not work , the car was completely locked down . After 30 minutes of trying to get into car we finally got my grandaughter to squeeze out of her car seat upon coaxing her we got her to get her car seat belt unlocked , she tried pushing the door lock buttons but nothing would work, we had her try to use window buttons but they would not work either , we tried having her manually unlock door but they would unlock but door would not unlock. …
Tl* the contact owns a 2003 Chevrolet Trailblazer 360. While driving at any speed, the instrument panel remained illuminated and flashed different warnings for several hours until the engine was turned off. The contact stated that the failure recurred several times for approximately three years. The vehicle was taken to a local dealer where it was diagnosed that a modular failure occurred with the instrument panel. The dealer stated that the vehicle was not included in a recall. The manufacturer was notified. The vehicle was not repaired. The failure mileage was 150,000.....updated 03-31-16
Fuel & propulsion system
Tl* the contact owns a 2003 Chevrolet Trailblazer 360. The contact observed a puddle of fuel under the rear of the vehicle. The vehicle was not diagnosed nor repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 192,385.
Communicated to GM help center 10/30/2014: my 2003 Chevy trail blazer has a strong odor of gas in the rear. The vehicle has only 63,000 miles and has been well maintained. I "googled" the problem and found it to be a known issue. In part: NHTSA #: pe07014 "in June 2007, GM will expand its special policy to address fuel tank inlet check valve (icv) fractures." will you help me remedy this problem? Short story, they reviewed my description of the problem and ultimately declined any remedy. I can understand that the extended warranty has pasted, but my issue is I never received any notification as noted in NHTSA # pe07014. Had I received that notification I would certainly have followed up on the problem. This vehicle was purchased new and has very low miles for being a 2003. In view of the lack of notification, I think the vehicle should be covered as outlined as part of pe07014. …
Frequently asked questions
Is the 2003 Chevrolet Trailblazer 360 a good car?
Based on 11 owner complaints filed with NHTSA, the 2003 Trailblazer 360 rates better than average: 76% fewer complaints than a typical year of the Trailblazer 360 at the same age. It is one of the best Trailblazer 360 years by this measure. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2003 Chevrolet Trailblazer 360?
The electrical system — 5 complaints, 45% of all complaints for this model year. Next are the fuel & propulsion system (3) and air bags (2).
How many recalls does the 2003 Chevrolet Trailblazer 360 have?
NHTSA lists no recalls for the 2003 Chevrolet Trailblazer 360. You can still confirm with your VIN using our VIN recall check.
What are the best and worst years of the Chevrolet Trailblazer 360?
The best years by complaints, compared at the same age, are 2002, 2003 and 2004. Years to avoid or approach with caution: 2007, 2006 and 2005. See the full Chevrolet Trailblazer 360 years comparison.
At what mileage do 2003 Chevrolet Trailblazer 360 problems happen?
The median mileage reported in complaints is about 102,000 miles; 0% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.