2005 Chevrolet Trailblazer EXT 370

Typical pattern

3.3% of complaints about the 2005 Chevrolet Trailblazer EXT 370 came in the first year, which is unremarkable for a 2005 vehicle — around the middle of the 245 model-years on record. The median complaint arrives at 5.6 yr in service. The most-reported system is electrical system (103 complaints), typically at 5.4 yr or about 72,000 miles.

Complaints: 300
Median age at failure: 5.6 yr
Median mileage: 70,000 n=251
Crash / fire / tow: 5.3% of reports
Safety recalls: 0

In owners’ own words

Electrical system mileage not reported 1.0 yr in service

VEHICLE SHOCKS ME & ALL OCCUPANTS ALMOST EVERY TIME WE EXIT THE VEHICLE. GM REFUSES TO ACKNOWLEDGE THERE IS A PROBLEM. I HAVE BEEN TO 3 DEALERS TO RESOLVE THE PROBLEM

Electrical system 41,000 mi 5 mo in service

HEATER BLOWER IS GOING OUT, THEN GOES BACK ON IF I TOUCH THE WIRES GOING INTO THE MOTOR HOUSING. NOW THE SPEEDOMETER IS GOING WACKY. SHOWS 120 MPH NEVER GOES BACK TO ZERO. THIS IS AN ONGOING PROBLEM WITH GM PLEASE INVESTIGATE.*JB

Electrical system 35,999 mi 2.5 yr in service

2005 TRAILBLAZER. MIDDLE OF HIGH WAY ENGINE STOPPED AND INSTRUMENT PANEL WENT CRAZY. SOME TIME LATER IGNITION KEY WORKED AGAIN. I CHANGED BATTERY BUT IT HAPPENED AGAIN AND WHEN I TURNED THE IGNITION KEY TO START THE ENGINE, SOMETIMES IS WORK AND SOMETIMES ID DOESN'T. THE DEALER WANTED ME TO PAY FOR DIAGNOSIS FEE MY CAR IS 46000 OUT OF WARRANTY AND AS I CHECK INTERNET FORUM SOME PEOPLE HAVE THE SAME TROUBLE AND DEALER COVERED THE MONEY HOW CAN I PROTECT MY FAMILY WITH THE ENGINE STOPPING IN MIDDLE OF HIGHWAY!!!!!!!! *JB

Fuel system, other 40,000 mi 2.8 yr in service

2005 TRAILBLAZER FUEL GAUGE OUT OF ORDER A LOT OF PEOPLE WHO HAS SAME CAR LIKE ME HAS SAME TROUBLE HAPPEN ALSO CHEVY KNOWS ABOUT THIS TROUBLE FROM FUEL PUMP AND LEVEL SENSOR TROUBLE THEY JUST WANT TO MAKE MONEY OUT OF THIS ISSUE THAT'S REALLY BAD IDEA AND MY CAR MAKE THIS TROUBLE ONLY IT WAS 40K MILE CAN YOU BELIEVE THIS. *TR

How to read this

This is what owners reported, not a reliability rating. People file with NHTSA about alarming failures, not routine ones, and complaint volume tracks how many cars were sold.
Failure ages come from the incident date on each complaint, populated on about 83% of records. Mileage is shown where reported — NHTSA’s 2021 system change cut mileage capture to roughly 15%, so it thins out sharply after MY2020.
Every rank compares this vehicle only against others of the same model year. A 2025 car has not had time to accumulate five-year failures, so comparing early-failure share across years is meaningless.
Fourteen make-months distorted by media storms and mass recalls — Toyota in February 2010 ran 11× normal volume across 33 models — are excluded.
Recalls are manufacturer actions and authoritative; complaints are not. A recall listed here may already have been performed on any individual car. Check a specific VIN at nhtsa.gov/recalls.

2005 Chevrolet Trailblazer EXT 370

When each system is reported — middle 50% of complaints

In owners’ own words

How to read this