Engine hot AC turned off

Asked by Mar 18, 2016 at 10:06 AM about the 2007 GMC Sierra 1500 SLE1 Ext. Cab SB 4WD

Question type: Maintenance & Repair

My 07 GMC Sierra 4x4. 5.3 eng. The DIC
reads engine hot a.c. turned off. I removed
battery cable reset. The computer and it
works again when it reads hot the temp
gauge is all the cold the a.c. is off and one
off the fan is running on high is it my temp
sending unit or a short it does it off and on

1 Answer

118,195

That sounds like you have a pending BCM failure, best get it checked out by as professional. FYI do not disconnect the battery on later model vehicles, you can and often loose the factory presets and then the accessories won't work, you have to take it back to a dealer to have it reflashed to match the VIN. If you have to remove the battery they make a preset saver the plugs into either the lighter or power port, a more expensive model plugs directly into the OBD2 port. A must have tool if you do any electrical system work.

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