2003 Chevrolet Trailblazer: Reliability Data

Source: NHTSA — 1160 complaints
1160
Total Complaints
73,000mi
Median Mileage
ELECTRICAL SYSTEM
Top Issue
84
Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

39,038 25th Percentile
73,000 Median Mileage
118,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ELECTRICAL SYSTEM
170
ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
82
FUEL SYSTEM, GASOLINE
56
FUEL/PROPULSION SYSTEM
55
AIR BAGS
45
POWER TRAIN:AUTOMATIC TRANSMISSION
38
EXTERIOR LIGHTING
36
POWER TRAIN
34
FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY
26
EXTERIOR LIGHTING:BRAKE LIGHTS
23

Severity Assessment

84
Crashes
24
Fires
86
Injuries
3
Deaths

Sample Complaint Reports

"WHILE DRIVING AT HIGHWAY SPEEDS VEHICLE SUDDENLY STEERED OFF TO THE LEFT AND HIT A TREE. CONSUMER HAD NO CONTROL OF STEERING. PLEASE PROVIDE ANY FURTHER INFORMATION.*AK"
"COSUMER STATES THE VEHICLE FOUR WHEEL DRIVE WOULD NOT ENGAGE WHILE DRIVING. VEHICLE TAKEN TO THE DEALER FOR REPIRS AND THE PROBLEM WOULD REOCCUR. FEEL FREE TO PROVIDE ANY FURTHER INFORMATION."
"CONSUMER STATES WHILE DRIVING APPROX 50MPH AND PROGRESSING AROUND A TURN, VEHICLE BEGAN VEERING FROM LEFT TO RIGHT. CONSUMER THEN LOST CONTROL AND TRUCK WENT INTO A 360 DEGREE SPIN AND VEERED OFF THE ROAD. THE LEFT FRONT AND REAR TIRES CAME COMPLETELY OFF THE RIM. TS"

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28