"How reliable is the 2002 Chevrolet Trailblazer Ext?"

"Based on 120 NHTSA complaints, the 2002 Chevrolet Trailblazer Ext has a median complaint mileage of 64000 miles. The most common issue is POWER TRAIN:AUTOMATIC TRANSMISSION."

"What are common problems with the 2002 Chevrolet Trailblazer Ext?"

"The most frequently reported component in NHTSA complaints for the 2002 Chevrolet Trailblazer Ext is POWER TRAIN:AUTOMATIC TRANSMISSION, accounting for a significant portion of the 120 total complaints filed."

2002 Chevrolet Trailblazer Ext: Reliability Data

Source: NHTSA — 120 complaints

120

Total Complaints

64,000mi

Median Mileage

POWER TRAIN:AUTOMATIC TRANSMISSION

Top Issue

Crash Reports

When Do Complaints Happen?

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

40,000 25th Percentile

64,000 Median Mileage

91,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

POWER TRAIN:AUTOMATIC TRANSMISSION

ELECTRICAL SYSTEM

FUEL SYSTEM, GASOLINE

FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP

ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN

EXTERIOR LIGHTING:BRAKE LIGHTS

FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY

STRUCTURE

ENGINE AND ENGINE COOLING:ENGINE

EXTERIOR LIGHTING

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"THIS PROBLEM CONCERNS A REPEATED LIGHTING SYSTEMS FAILURE. THIS INCIDENT OCCURRED WHEN I WAS NOTIFIED BY ANOTHER MOTORIST THAT WHEN I HAD THE BRAKES ON WHILE STOPPED AT A STOP LIGHT THAT BOTH THE LEFT AND RIGHT TAIL STOP LAMPS WERE NOT LIT ALTHOUGH THE CENTER HIGH MOUNTED STOP LAMP DID LIGHT TO IN..."

"BRAKE LIGHTS CONTINUOUSLY FAIL IN MY 2002 TRAILBLAZER. THE DEALER REPLACED THEM A COUPLE OF TIMES WHILE I WAS HAVING OTHER CHEAP MADE INFERIOR PARTS REPAIRED OR REPLACED UNDER WARRANTY OR RECALL. THE PROBLEM IS THE CONTACTS IN THE BULB SOCKET ARE TO FAR APART AND DO NOT MAKE A SECURE CONNECTION WIT..."

"WE HAVE A 2002 CHEV. TRAILBLAZER EXT. THIS VEHICLE'S CRUISE CONTROL CUTS OUT WHILE IT IS SET. IT HAS HAPPENED NUMEROUS TIMES - TOO MANY TO COUNT - AND AT DIFFERENT SPEEDS DEPENDING ON THE STATE AND SPEED LIMIT. THE CRUISE LIGHT DOES GO ON WHEN IT IS ORIGINALLY SET BUT GOES OFF AT RANDOM AND WITH TR..."

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