My truck came with LED tail lights, but had an incandescent white bulb for the reverse lights. I changed all my lights (headlights, turn signals, and marker) in the front to LED. I also changed the reverse lights and license plate lights to LED.
I had hyper flash on only the right (passenger) rear tail light. I had the dealer check and they said it was because of the LED lightbulb (that I put in) in the reverse socket that caused the hyper flashing. I told them that they did not know how electricity works since the lights were not on when the hyper flashing was occurring. I told them to check for loose connectors, and possible floating grounds. The changed the tail light assembly twice. After the second time I checked all the connectors and found a few that were loose and not locked (red clamp closed). I fixed that and have not had any problems since.
From my experience with the dealership service center where I purchased my vehicle from, I believe they are good parts exchangers but not good mechanics/technicians. I know some call themselves auto technicians because they work on electronics and computer system of the vehicles. Others don’t mind being called auto mechanics and they do check computers and the electrical system.
I have gone to another dealership and will continue to go to this dealership as they did right by me. I needed the turbo to be replaced as it failed, and they paid for the rental since they did not have a loaner vehicle. They had my truck for a little over a month.