One problem related to horn assembly has been reported for the 2005 GMC Envoy. The most recently reported issues are listed below.
The oil gauge went out first and the dealer stated the oil sending unit need to be replace and it would cost me over 300. 00 dollars, then next the engine coolant gauge starting going crazy. I took my car back for an oil change and was told the instrument panel cluster needs replacing. I went back to have my engine coolant gauge look at by the dealer because I did not want to be stranded somewhere with my 4 year toddler in the car and paid for the dealer to replace the engine coolant thermostat based on their instructions. Still my oil pressure gauge was pegged out and now the speedometer gauge has completely stop working, so I took my car back to the GMC dealer and was told the instrument panel cluster need to be replace and that would take care of the oil pressure gauge too. I would have to pay over $570. 00 dollars to replace instrument panel cluster and that there is no way to fix the oil pressure gauge by itself. I am very upset after being quoted and told the first time by the dealer that they could fix the oil pressure gauge at one price and now tell me that without replacing the instrument panel cluster for the speedometer gauge they are unable to repair the oil gauge. I need assistance with this problem due to this is my only vehicle in which to take my preschool child back and forth to school and many days other drives from behind have blown their horn at me due to going to slow because I am unsure what speed I am going. I was using the rpm gauge to help out but it has now stop working too. I contacted GMC about the problem but they directed me to the GMC dealer, which I am still waiting on a response from. This is a safety problem for me to be driving a car in which the instrument gauges just stop working at anytime.