2003 Chevrolet Trailblazer EXT Engine Problems
- Complaints
- 2about this part
- Share
- 1%of 313 total for the year
- Median mileage
- 93,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the engine of the 2003 Chevrolet Trailblazer EXT, 1% of the 313 complaints for this model year. Where a mileage was given, the median is 93,000 miles. 1 a fire, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The contact owned a 2003 Chevrolet trailblazer. The contact stated that while driving 70 MPH, fire erupted from underneath the vehicle. The vehicle stalled as the contact merged to the shoulder. The contact and all of the passengers exited the vehicle as it became engulfed into flames and was destroyed. The fire department and the police were notified. A report would be available if needed. No one was injured. The insurance company was notified. The contact also stated that the vehicle was repaired for routine maintenance two months prior. The manufacturer was not notified. …”
NHTSA complaint #10465764, filed 2012-07, 66,000 milesRelated service bulletins
- 11004761Jun 28, 2024This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or…
- 10211658May 2, 2022This service bulletin provides policy information on warranty administration guidelines for multiple repairs with independent causes (GM Canada Dealers Only).
- 10082869Aug 29, 2016This informational bulletin provides additional information on how to install pistons and suggest what tools to use.
- 10082814Aug 2, 2016This informational bulletin provides information to gm dealers on the correct cleaning methods when cleaning engine gasket sealing surfaces.
- 10201098Dec 1, 2015OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification
- 10190503Dec 1, 2015OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification
Engine: other model years
Other parts of the 2003 Chevrolet Trailblazer EXT
89 complaintsElectrical system
77 complaintsTransmission and drivetrain
49 complaintsVisibility (wipers, defrost, mirrors)
26 complaintsExterior lighting
23 complaintsBody and structure
20 complaintsEngine cooling
16 complaintsBrakes
13 complaintsLatches, locks and linkages
13 complaintsSuspension
12 complaintsOther or unknown
7 complaintsVehicle speed control
7 complaints
← All problems reported for the 2003 Chevrolet Trailblazer EXT
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology