Three problems related to engine cooling system have been reported for the 2003 GMC Envoy. The most recently reported issues are listed below.
2003 GMC Envoy sle with 42,000 miles. Check 4 wdrive light came on then went back off. Dealer stated that the tccm had to be reprogrammed due to a bulletin. It cost me out of pocket no warranties cover this. Also the fan clutches went out but was replaced by extended warranties. I'm also told by dealer that the steering links are worn & should be replaced. This too is at my cost. I have only had this car 1 year. These happened with just a few weeks of each other.
We bought this car used. Well before we bought it, they had the a/c fixed, due to it not working properly. Well the rear a/c and heat still do not work. Sometimes it comes on, and other times it does not. It does not give out heat at all in the rear. This is a real issue for us and many others with children. I have read plenty of other reports stating the same or very close. In all in all, this should be recalled and fixed. These cars are way to expensive to have this issue and not have GMC step up to the plate and fix their issue.
Air conditioning runs hot- there is a technical service bulletin out for this but it needs to be an open recall to be fixed--- needs reflash for control head-that's what my mechanic said.