I had the same problem, does it affect the outlets in the bed(if you have them)?
I checked the fuse and replaced it, still didn't work. Turned out to be a faulty OEM inverter. The dealership replaced it and I've had no issues since
I dropped mine off at the dealership 2 days ago, they just called and said the traced the issue to the ATCM ( All Terrain Control Module). They're replacing it.
I just picked up my 24 Lariat from the dealer. They had it for 2 weeks and couldn't replicate the issue. This is the second time it's happened to me. The first, they were able to reload a module with a fault code. But he second time there was no code.
Another thread post a user said they kept...