Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

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Print this page Notes: The Trailblazer emerged from an "upscale trim line" of the Blazer, but there's nothing upscale about its transmission problems or its wonky, unpredictable headlights.


pretty bad
Typical Repair Cost:
No data
Average Mileage:
100,000 miles
Total Complaints:
2 complaints

Most Common Solutions:

  1. not sure (2 reports)
2002 Chevrolet Trailblazer accessories - interior problems

accessories - interior problem

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2002 Chevrolet Trailblazer Owner Comments

problem #2

Jun 142011

Trailblazer LTZ 4.2L

  • Automatic transmission
  • 82,000 miles


Behind the right rear panel is two modules. One is closer to the front of the truck and controls the rear heat. The other module is closer to the rear door and controls the rear a/c and the heat. With this being broken, the air from the roof is coming out hot with the a/c on. So, I removed the module. This stopped the clicking noise but it still blowing hot. Also, who knows what the cost of that control valve is. The tip is broken and I am going to try to glue it and see how long it lasts...

- , Staten Island, NY, USA

problem #1

Nov 032010

Trailblazer EXT 4.2L

  • Automatic transmission
  • 118,000 miles

The actuator which is behind a panel over the right rear wheel well starts clicking when vehicle is started and then continues till it damn well pleases. I haven't noticed any effects to the vehicle operation other than I hate driving it with all that clicking.

- , Manassa, CO, USA

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