Pontiac Problems? Ask a Mechanic for Answers ASAP
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.Bill,Can you tell me what year your G6 is and also, are you able to scan the computer system and see if there are any fault codes setting. Post back with complete information and I will try and help you get this resolved.
Bill the VSS signal is sent to the TCM and from there to the ECM, if your getting correct speed at the TCM then you are most likely dealing with a problem with either the ECM or the circuit from the TCM to the ECM. See the steps in the link below to check it. Copy and paste the link to your browser to open and view it.https://dl.dropboxusercontent.com/u/104923897/Speedometer%20Feb%2011.pdf