Update. I took to back to dealer. Asked if maybe it could be the EVIC. They took it in the shop and re scanned. Suddenly the Check Eng light came on, The ABS light came on and the traction control light came on. They still offered no definitive solution. A bit of history- during Covid they couldn't get the ecm for a ignition power issue so they did an "overlay". I also asked if maybe that could be part of the problem and was basically told I have no idea what I'm talking about. So, I took my truck and left. Perhaps I will try a different dealership.
What is an overlay, a term for some type of circuit bypass? If they have altered the truck electrical system or rewired it in any way, I would demand that they provide documentation, including schematic diagrams or return the wiring to OEM for no cost. Obviously, their solution is defective.
They sound like they're a bit arrogant, telling you that you don't know what you're talking about. Especially, when they seem to be unable to fix a problem with their product. I agree, time to find a new stealership.
If you're continuing to experience multiple electrical system anomalies, I would backup to the beginning and start with load testing the battery and then verifying all common grounds.
The electronics in our trucks are very sensitive to either one of those conditions being only slightly subpar.
Most auto parts stores will test your battery at no charge. Ideally, make sure they use a toaster type load tester because the results are much more reliable. You might consider buying your own because they're only about $20 from HarbourFreight and a great tool to own. I have 2 of them.
Amazing deals on this 100 Amp 6/12V Battery Load Tester at Harbor Freight. Quality tools & low prices.
www.harborfreight.com
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