Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
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Ted,Have you scanned the computer system to see what the fault code and or codes are that should be setting?
Okay I am sending you the steps to pinpoint the cooling fan and the system. See the steps in the link below. Have a look and post back if you have more questions and or need more help and we can work from there.https://dl.dropboxusercontent.com/u/104923897/cooling%20fan%20Oct%2011.pdfSee the wiring diagram in the link below as well for testing reference.https://dl.dropboxusercontent.com/u/104923897/Cooling%20fan%20wiring%20Oct%2011.pdf
Are you getting proper and ground to the module?
The cooling fan system gets its ground from the G105 located at the left front of the engine block. See the location in the link below, its #4 in the diagram.https://dl.dropboxusercontent.com/u/104923897/G105%20Oct%2021.pdf
Are you sure the 60 AMP fuse for the cooling fan is not blown. Its located at position 1 in the under hood fuse block. Did you check it?
Okay , I have also enclosed test step for the code P0691 in the link below.https://dl.dropboxusercontent.com/u/104923897/Cooling%20fan%20testing%20Oct%2021.pdf
Okay , Im here most day if you need me.
It could very likely be defective if it worked okay for two days. If the testing looks okay that may be the case. If the module only lasted two day I would see if they will replace it under warranty.