I have a 1984 GMC Pickup 6.2 Diesel motor. I’m not getting an fire from one side of the glowplug relay that actually goes to the glow plugs. A few of the glowplugs are bad, and I’m about to change them. Will this cause the relay not to put out current to the glow plugs?.

My grandpa bought a 1953 Chevy Pickup in need of repairs and he was wondering if it would be possible for him to use parts off of a ’53 GMC Pickup on the truck.