hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
134,000 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2004 Chevrolet Trailblazer EXT drivetrain problems

drivetrain problem

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2004 Chevrolet Trailblazer EXT Owner Comments

problem #3

Apr 102014

Trailblazer EXT 4WD 6-cyl

  • 114,000 miles


The transmission cooling lines corroded and caused a transmission fluid leak. The engine rpms increased and the vehicle lost power while going down interstate 86. When the fluid leaked out of the transmission cooling lines, it sprayed all over the exhaust pipes, which caused a severe fire hazard. Due to the loss of transmission fluid, it cased significant damage to the transmission internals.

- Olean, NY, USA

problem #2

Jun 202014

Trailblazer EXT 6-cyl

  • 142,000 miles
Driving home from work brakes started locking up drove home took apart front an rear brakes found front calipers locked up changed calipers an brake pads front an rear tried to bleed brakes had a spongy pedal filled master cylinder an noticed brake fluid leaking under master cylinder connector behind front driver side wheel no part to fix no listing. Cannot drive car. That's just one problem transmission lines rotted an changed 2 years ago. Power steering cooler rotted out lost all power steering fluid 1 month ago an put after market cooler in. Also air conditioner lines rotted out cannot hold R34 coolant anymore.

- Mastic Beach, NY, USA

problem #1

Jan 042012

Trailblazer EXT 6-cyl

  • 146,000 miles
Car felt "stuck" in gear, wouldn't accelerate, low on transmission fluid. Added more fluid, replaced speed sensor, camshaft & crankshaft sensors. Still having issues with rpms going high, car slamming from one gear into another. Also cannot run heat while driving, fan draws power & causes engine to stall out. Car also burning through gas very quickly.

- Oakdale, CT, USA

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