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The immobilizer I linked above only requires swapping the OEM starter relay for the immobilizing one -- no other components (other than the immobilizer's remote control) are needed. So far, I've had no issues with it. It also has a "valet" mode that temporarily allows the truck to start...
This company's immobilizer has worked well for my '25 diesel 2500. I have the original starter relay hidden in my truck in case the immobilizer ever has any issues.
https://www.mobilistics.com/nostart-remote-controlled-intelligent-relay-w-remote-starter-fuel-pump-immobilizer/
@dg2024, I have the digital mirror trailer camera for my '25 Laramie 2500 and agree that the bumper connector is very fragile. Also had connection issues that were caused by a bent pin on the trailer-side plug. After straightening the pin, it works fine (i.e., image flickers on very rare...