GMC Troubleshooting Questions? Ask a Mechanic for Answers
I am sorry your having this problem
the remote start systems will NOT work when the check engine light is on and there are codes set in the computer
once the check light is off and the code fixed the remote start will work again
any idea what the code numbers are set in the computer ?
any Pep Boys or Auto Zone will scan the trucks computer for codes for free for you
once you know what the code is set for we can narrow this issue right down
how are you making out ?