GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hello, my name is***** vehicle has two evaporators which are like small radiators that are blows through to cool down for the AC. There is one for front and one for the rear. If your front ac works good but not the rear then your evaporator likely needs to be replaced which is about a $500 job to have done at a shop. If neither front or rear gets very cold then system may just need to be recharged which is around $150. Let me know if you have more questions or if there is anything else I can do to help. Thanks.