AI Damage2002 Chevrolet Trailblazer EXT: common problems
Owners of the 2002 Chevrolet Trailblazer EXT filed 100 complaints with NHTSA, most often about fuel system and powertrain. Details by component below, with sources.
Key figures
- Owner complaints
- 100
- involving a crash
- 3
What fails most often
- 1 Fuel system 23% of all complaints
- 2 Powertrain 20% of all complaints
- 3 Electrical system 14% of all complaints
- 4 Engine and cooling 14% of all complaints
- 5 Exterior lighting 10% of all complaints
- 6 Visibility 10% of all complaints
- 7 Latches, locks, linkages 6% of all complaints
- 8 Structure 5% of all complaints
- Fuel system: 23 complaints (23% of all).
- Powertrain: 20 complaints (20% of all).
- Electrical system: 14 complaints (14% of all).
- Engine and cooling: 14 complaints (14% of all).
- Exterior lighting: 10 complaints (10% of all).
Symptoms owners describe
How many of the 100 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Fuel system | 23 | 0 | 0 |
| Powertrain | 20 | 0 | 0 |
| Electrical system | 14 | 0 | 0 |
| Engine and cooling | 14 | 0 | 0 |
| Exterior lighting | 10 | 0 | 0 |
| Visibility | 10 | 0 | 0 |
| Latches, locks, linkages | 6 | 0 | 0 |
| Structure | 5 | 0 | 0 |
| Equipment | 4 | 0 | 0 |
| Suspension | 4 | 1 | 0 |
| Air bags | 1 | 1 | 0 |
| Seat belts | 1 | 1 | 0 |
| Seats | 1 | 0 | 0 |
| Steering | 1 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
1)driving down city street with no warning. Was not able to control car pulling to the right. Car went into the yard of someones home bouncing over an embankment of dirt. Looked around car and found passenger front tire was at a 45% angle. Rod holding tire in place not connected and looked clean on the end.
Front end crash and the air bags did not deploy. Vehicle was totaled.
The driver's seat belt failed to restrain the consumer. The driver sustained major injuries, and was transported to the hospital by ambulance. The vehicle was towed to a garage for inspection. This information was provided by mr. Nathan's wife mildred chatman.
My check engine turned on inside the car it was smelling like gas . I went to a local shop they did a diagnostic test and its a fuel tank leak . Its leaking right were the fuel goes in the tank . I called chevrolet and they said there is no recall . But I found a recall for this vehicle action #eao7009.
When temperatures above 50 degrees air conditioning not responsive (even when temperatures in excess of 100 degrees, "heater" comes on due to erroneous outdoor temperature reading).
Pulled into driveway, lights would not go off, a few minutes later smoke was coming out from under hood and it smelled like burning plastic. Popped hood and fuse block and relay we smoking and melting! Got fire extinguished and pulled the head light relay switch, but it had melted through the block!!!!
The headlight wiring inside of the lens assembly over heats and melts the electrical connector going to the bulb and the insulation on the wiring. This has happened to both headlights on more than one occasion. Had to go and have the electrical wiring plus connector replaced.
Prior to going on a vacation I brought the truck into my mechanic for an inspection as usual and he informed me the transmission fuel lines had to be replaced due to excessive corrosion. He also advised me that this was a common problem with this model which prompted chevrolet to change the design.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 3,569 of 36,656 model years in the NHTSA data (top 10% most complained about).
On average one model year of the Trailblazer EXT has 216 complaints (4 years in the data). This year has 100, below average.
What to check before buying
- Fuel system. Fuel smell, leaks, rough running, fuel-system codes.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
Other years of this model
Questions and answers
What are the most common problems with the 2002 Chevrolet Trailblazer EXT?
Owner complaints to NHTSA most often mention: fuel system, powertrain, electrical system. Total complaints: 100. The most frequent symptoms in complaint texts: warning lights, check engine (13%), windows, sunroof (10%), rust, corrosion (9%).
How many service bulletins (TSB) were issued for the 2002 Chevrolet Trailblazer EXT?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2002 Chevrolet Trailblazer EXT from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2002 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.