2003 Chevrolet Trailblazer Ext: Reliability Data

Source: NHTSA — 405 complaints
405
Total Complaints
65,828mi
Median Mileage
ELECTRICAL SYSTEM
Top Issue
8
Crash Reports

When Do Complaints Happen?

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

39,834 25th Percentile
65,828 Median Mileage
91,010 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ELECTRICAL SYSTEM
52
FUEL SYSTEM, GASOLINE
36
POWER TRAIN:AUTOMATIC TRANSMISSION
29
ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
22
FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY
15
FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP
13
FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
11
EXTERIOR LIGHTING
10
VISIBILITY:POWER WINDOW DEVICES AND CONTROLS
9
POWER TRAIN
8

Severity Assessment

8
Crashes
7
Fires
11
Injuries
0
Deaths

Sample Complaint Reports

"THIS VEHICLE IS 4 MONTHS OLD AND JUST ROLLED OVER TO 7000 MILES. IT IS IN THE SHOP CURRENTLY FOR THE SIXTH TIME AND HAS NOW BEEN OUT OF COMMISSION FOR OVER 30 DAYS. IT HAS HAD MULTIPLE TRANSMISSION PROBLEMS; VALVE BODY TWICE, TORQUE CONVERTER, SHIFT SOLENOID, BTSI SOLENOID, FLOOR SHIFTER (WITH CONSO..."
"THIS VEHICLE IS 4 MONTHS OLD AND JUST ROLLED OVER TO 7000 MILES. IT IS IN THE SHOP CURRENTLY FOR THE SIXTH TIME AND HAS NOW BEEN OUT OF COMMISSION FOR OVER 30 DAYS. IT HAS HAD MULTIPLE TRANSMISSION PROBLEMS; VALVE BODY TWICE, TORQUE CONVERTER, SHIFT SOLENOID, BTSI SOLENOID, FLOOR SHIFTER (WITH CONSO..."
"THIS VEHICLE IS 4 MONTHS OLD AND JUST ROLLED OVER TO 7000 MILES. IT IS IN THE SHOP CURRENTLY FOR THE SIXTH TIME AND HAS NOW BEEN OUT OF COMMISSION FOR OVER 30 DAYS. IT HAS HAD MULTIPLE TRANSMISSION PROBLEMS; VALVE BODY TWICE, TORQUE CONVERTER, SHIFT SOLENOID, BTSI SOLENOID, FLOOR SHIFTER (WITH CONSO..."

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