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.


really awful
Typical Repair Cost:
Average Mileage:
51,000 miles
Total Complaints:
2 complaints

Most Common Solutions:

  1. having a specific check engine code for the problem (1 reports)
  2. replace fan clutch (1 reports)
2003 GMC Envoy cooling system problems

cooling system problem

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2003 GMC Envoy Owner Comments

problem #2

Jun 282007

(reported on)

Envoy SLE 4.2L L6

  • Automatic transmission
  • 54,000 miles


it pissed me off that I vehicle with only 55000 miles is having overheating problems, first thing the fan clutch, now after like a couple of thousand miles the vehicle temperature is going over 3/4 on the gauge, my poor wife and kids had to suffer on the 110F heat in Arizona when she had to turn off the A/C and shut down the vehicle because it was overheating seriously. The mechanic told me that the possible thing that was creating that, was the Thermostat, I'm going to replace it to see if that fixes the problem. If not I'm going to be really mad because the vehicle is giving me so many problems, that i'm really thinking on selling it or trading it in.

- , Yuma, AZ, USA

problem #1

Jun 282007

(reported on)

Envoy SLE 4.2L L6

  • Automatic transmission
  • 48,000 miles

A few thousand of miles after I bought the used vehicle, I noticed that the vehicle A/C was not cooling properly, and I was wondering what it was since there was no check engine light, I tried putting more Freon gas on the A/C just to see if that was the problem, but that was not it, so I went with this problem for a few weeks until I got tired and I asked the mechanic what was the problem with the A/C not working properly, he checked ot and he found out that it was the fan clutch that It was not not working properly and that was causing a high pressure on the A/C line causing a shutdown on the A/C compressor everytime the line had a high pressure on it. I replaced the fan and it seems to work better not as a regular A/C should work because it takes a little bit longer to cool, I wonder if that high pressure affected anymore components since I believe that the A/C is not cooling as before.

- , Yuma, AZ, USA

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