Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hi there, I am Cam. There are a couple things this could be.
First there is a known issue with the network on the vehicle, wire chaffing. You will find a very detailed bulletin in the document attached. https://dl.dropboxusercontent.com/u/22552935/network%20bulletin.pdf Also common is a loose battery cable connection into the mega fuse in the block behind the battery on the firewall. I would take a moment and remove those, check and clean them and see if that makes a change to your issue.