Found I have to fault codes UO140, lost communication with body control module, and U0121, lost communication with anti lock control, something similar happened to my 06 GMC Sierra, had lost communication with body control module, and at that time mainly the issue was couldn't roll up windows, in bad rain storm, and steering wheel radio control lost connection with device, , and I believe that's when ac quit working on it. The dealership kept my truck 3 days and then charged $950.00 labor and no parts were used. Total scam I believe. And currently still no ac on the 06 GMC haven't really trouble shot it, but seems to be a controler issue. But need to check itd relay and fuse. Says s dead battery can cause BCM issues. IDK
Saturday, June 3rd, 2023 AT 4:08 AM