1994 K2500 Suburban 6.5 turbo.
My PMD is mounted behind the upper grill and when I unplugged it to remove the grill to clean and paint the cooling stack I noticed there is NO resistor inside the plug of the PMD. Truck runs fine and I suspect the last guy that worked on it left the resistor on the original PMD. Also I can not identify the maker of the relocated PMD it only has the numbers 15170 on it with 3 paint dots white green and red. Any clue to what brand it is? Thinking of buying a flight systems for behind the bumper amd leaving this one installed as a instant plug in backup.