Most common 2004 Chevrolet Trailblazer EXT 370 problems
Share of the 15 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Chevrolet Trailblazer EXT 370 complaints by model year
Best Trailblazer EXT 370 years: 2002, 2003. Years to avoid: 2005. Compare all years →
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2004 Chevrolet Trailblazer EXT 370:
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 2004 Chevrolet Trailblazer EXT 370 owners say
Electrical system
I parked the car in my driveway and the passenger side mirror started clicking. The mirror was attempting to rotate to the extreme car side of the mirror. Using the remote mirror control had no effect.the car was turned off and the mirror motor continued to try to move the mirror past the limit. After several minutes, the clicking stopped and there was an odor of plastic burning. After the clicking stopped, neither mirror moved. The local mechanic said the wiring to the motor had burned and shorted the mechanism. I was lucky that there was no damage to the interior of the door. Has this malfunction been a problem with the trailblazers?
Switches for the power window and heated driver's seat on driver's door panel stopped working. Heater for driver's seat turns on, on its own and cannot be controlled with the switch. While the heater for driver's seat is on, the instrument panel flickers. The heater for driver's seat turns on and off, on its own and each time it comes on, the instrument panel flickers.
Fuel & propulsion system
Received a letter from GM regarding potential problem with fuel tank inlet valve. Took vehicle to dealer len stoler, inc in westminster md in December. Problem was diagnosed as a fuel tank inlet valve fracture. On dec 3rd 2015 fuel tank was replaced and inspection done. Subsequent to service when fuel was placed in vehicle gas poured out on pavement. Prior to that service this was not an issue only the smell of fuel in the interior and a few drops of fuel noted. Took vehicle back to dealer and problem now diagnosed as inlet pipe fracture. Was told I would have to pay for this service, despite service dept having not mentioned this when fuel tank was replaced and vehicle inspected and left dealer in unsafe operating condition. Part was not available and was told I should drive it and have work done later. …
Tl* the contact owns a 2004 Chevrolet Trailblazer EXT 370. While in a parking lot, the vehicle stalled without warning. The vehicle was towed to an independent dealer. The technician diagnosed that the fuel pump and fuel filter needed to be replaced the filler inlet was also cracked. The contact mentioned that the fuel pump, the fuel filter, and the hose were replaced. However, the fuel tank filler inlet was not. The manufacturer was not made aware of the failure. The approximate failure mileage was 115,869.
Frequently asked questions
Is the 2004 Chevrolet Trailblazer EXT 370 a good car?
Based on 15 owner complaints filed with NHTSA, the 2004 Trailblazer EXT 370 rates average: 1.3× as many complaints as a typical year of the Trailblazer EXT 370 at the same age. 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 2004 Chevrolet Trailblazer EXT 370?
The electrical system — 6 complaints, 40% of all complaints for this model year, most often about instrument cluster/panel. Next are the fuel & propulsion system (6) and engine & cooling (1).
How many recalls does the 2004 Chevrolet Trailblazer EXT 370 have?
NHTSA lists no recalls for the 2004 Chevrolet Trailblazer EXT 370. You can still confirm with your VIN using our VIN recall check.
What are the best and worst years of the Chevrolet Trailblazer EXT 370?
The best years by complaints, compared at the same age, are 2002 and 2003. Years to avoid or approach with caution: 2005. See the full Chevrolet Trailblazer EXT 370 years comparison.
At what mileage do 2004 Chevrolet Trailblazer EXT 370 problems happen?
The median mileage reported in complaints is about 100,000 miles; 17% 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.