Ok, so I found the answer to the round disc on the side of the truck. Under the hood I found a module that was disconnected, but not removed and when I researched the module, it was an rf transceiver for an exhaust system for in the garage bay. The disc is for a magnet to attach to to hold the...
Has anyone tried one of these kits? The reviews say they work once you install the pin into the fuse block. https://www.amazon.com/YuanchiNB-Headlight-Compatible-2007-2014-Silverado/dp/B0CRR25S18/
That was my thought as well. Thinking the power inlet may have been used for a float charger, but not 100% sure. Hoping someone else has dealt with these. Most of the add-on equipment was removed already by the current owner, but may re-install if that’s what it was.
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