Hi I have a 2019 Acadia and it’s doing the same thing, A/c not working, temp gauge isn’t working. If I replace the thermostat should that fix the problem?
What year is yours? I wonder why the 2018s (only) also have a bulletin stating to update the ECM?Had the same issue as everyone here. P0128 code. Steering Assist reduced. Fan full speed. No A/C. Check engine light. Pulling the battery and resetting the code only clears things temporarily. It will come back and happen more often because the thermostat will get stuck more. The only fix is to replace the thermostat and housing. $1,400 repair at the dealer. My dealer was well aware of the this issue on Acadia’s and Traverses. There is even a GM service bulletin at this point telling the dealers about the issue and how to repair. Unfortunately at this point the shotty parts are passed to the consumers to repair at this point. If you haven’t paid the $500 shift to park repair yet on your Acadia be ready for that too. Had that fixed twice already under 65k mikes.
2018 3.6L SLTWhat year is yours? I wonder why the 2018s (only) also have a bulletin stating to update the ECM?