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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really awful
Typical Repair Cost:
No data
Average Mileage:
65,114 miles
Total Complaints:
2 complaints

Most Common Solutions:

  1. replace heater core (2 reports)
2003 Chevrolet Monte Carlo cooling system problems

cooling system problem

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2003 Chevrolet Monte Carlo Owner Comments

problem #2

Jun 062014

Monte Carlo SS V6

  • Automatic transmission
  • 100,000 miles


I had my dog in the car when the heater coil (or however you say it). He got a taste of the antifreeze into his mouth and had to be treated. It drained out all over my floorboard.

- , Florence, KY, USA

problem #1

Nov 292005

Monte Carlo SS 3.8L V6

  • Automatic transmission
  • 30,228 miles

I am back at the dealership again. this time my heater core actually exploded in my car (gross) and now it is being replaced. Remember just 3000 (3 months before) I was at the dealership because of a swooshing noise I swore was coming from my heater core. really upsetting because this could have been prevented!

- , Largo, FL, USA

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