2004 Chevrolet Trailblazer: Reliability Data

Source: NHTSA — 1302 complaints
1302
Total Complaints
68,000mi
Median Mileage
ELECTRICAL SYSTEM
Top Issue
69
Crash Reports

When Do Complaints Happen?

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

45,000 25th Percentile
68,000 Median Mileage
96,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ELECTRICAL SYSTEM
380
ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
245
EXTERIOR LIGHTING
74
FUEL SYSTEM, GASOLINE
70
FUEL/PROPULSION SYSTEM
43
VEHICLE SPEED CONTROL
35
POWER TRAIN:AUTOMATIC TRANSMISSION
31
AIR BAGS
30
ENGINE AND ENGINE COOLING
24
POWER TRAIN
23

Severity Assessment

69
Crashes
40
Fires
92
Injuries
7
Deaths

Sample Complaint Reports

"WHILE DRIVING SMOKE WAS COMING INTO VEHICLE THROUGH THE VENTS. CONSUMER WAS ABLE TO PULL OVER TO THE SHOULDER. A FEW MINUTES LATER VEHICLE CAUGHT ON FIRE. THE FIRE DEPARTMENT WAS CALLED. VEHICLE WAS TOTALED.*AK *MR"
"CONSUMER COMPLAINED ABOUT AN ENGINE PROBLEM WHICH CAUSED THE VEHICLE TO START INTERMITTENTLY. VEHICLE WAS TOWED TO THE DEALER. MECHANIC DETERMINED THAT THE STARTER NEEDED TO BE REPLACED. *AK"
"2004 TRAILBLAZER HAS 40 SECOND TURN ON OF HEADLIGHTS AND BACK UP LIGHTS WHEN REMOTE KEY USED TO UNLOCK DOORS. THIS HAS ON 2 OCCASIONS HAS CAUSED VEHICLES IN TRAVEL LANES TO SUDDENLY BRAKE BECAUSE WITH THE BACK UP LIGHTS ON BLAZER APPEARS TO BE BACKING INTO TRAFFIC. SOLUTION: ONLY OCCURS AFTER DARK, ..."

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