GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hello, can you clarify the a/c issue?
for the check engine light there could be hundreds of reasons the light will come on, the best thing you can do is run to a autozone or oreillys or advance auto parts and have them read the codes, they do it for free, then with the code i can tell you what is happening and give you the best advice.
Are you still needing assistance ? If so I am always here to help. Lou