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.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety. Notes: Carrying the not-so-proud traditions of its 2002 predecessor, the 2003 has a handful of instrument panel malfunctions that can leave you guessing your speed, engine temperature or how much gas is left in the tank.


pretty bad
Typical Repair Cost:
No data
Average Mileage:
72,000 miles
Total Complaints:
2 complaints

Most Common Solutions:

  1. not sure (1 reports)
  2. replace cooling fan clutch (1 reports)
2003 Chevrolet Trailblazer cooling system problems

cooling system problem

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2003 Chevrolet Trailblazer Owner Comments

problem #2

Jun 012011

Trailblazer LS V8

  • Automatic transmission
  • 84,000 miles


Have replaced fan clutch at a $103.00 expense but did not cure the problem of the roaring sound, and now found out it has something to do with a computer that controles the fan clutch. Since my vehicile isn't under warranty the dealer said it cost around $75.00 to reset the PCM software defect.

- , Barnett, MO, USA

problem #1

Nov 132007

Trailblazer EXT L6

  • Automatic transmission
  • 60,000 miles

Cooling fan clutch was staying fully engaged making the car sound like a school bus. The cooling fan clutch had to replaced, and the fan problem caused the water pump to have to be replaced as well.

- , Scotia, NY, USA

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