The 2013 Silverado testing showed good battery, alternator and no excessive draw so I had decided to look at a full scan for clues.
The ground at G302 looked like a good place to inspect after I monitored the voltage at the passenger presence module and found it to be dropping to 8 volts during a crank. Looking under the passenger seat I found several loose tools stored there. The socket set was in a case but screwdrivers and crescent wrenches all were laid loosely. Both screwdrivers had worn into the wire harness. I removed the tools and placed them in bag. I put the tools in the passenger rear floor (extended cab). I cleared the codes and monitored the voltage for several starts and now the drop was to 10.5 volts during cranking which should be fine. I did not access the ground which would require seat removal as it seems fine now. No codes have reset.
Now did the "fix" address the battery complaint? I don't know. It will be a wait and see but I do seem to have taken care of the problem I did find.
Kenny@GGAuto.Repair
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