MY TRUCK THROWS A WARNING THAT IT IS OVERHEATING...
2008 GMC C1500
April, 1, 2013 AT 11:01 PM
My truck throws a warning that it is overheating, at this point the heat gage quits working and it shuts off the AC.
the truck is not overheated and runs fine but no AC is a major pain in the gulf coast
a tech said it is a common problem and that the computer needs to be updated. This will need to be done at the dealer (not sure what it will cost). You can temporarily reset the computer to see if this "cures" the problem for a while.
Easiest way to reset on the go that I have found- motor off key at off position pop hood and disconnect the main fuse box buy pulling up the handles and the lift it up just an inch for about 10 sec lock it back down.
Or you could disconnect the battery for about one minute.
If this works, but only for a little while, you can be pretty sure the computer needs to be re-calibrated/reset.