I have been a Red Seal HD mechanic for over 40 years. Never met a machine smarter than me...I always win. Sometimes it takes a while and sometimes I need to ask advice, but it always results in a win. Thanks again everyone.
Okay, problem solved! After cleaning all the ground connections, I started to check continuity between battery negative and each ground. Found the PCM ground stud near the back of the RH intake manifold did not have continuity, despite cleaning. Moved the ground to the rear most stud and got a...
I have a 94 GMC 3500, 6.5TD reg cab LB, all stock except pmd cooler. 500k km and runs great. Recently replaced GPC because of short glow plug on time. Fixed that problem, but after a few starts, glow plugs won't come on, no WTS light, cranks but no start. DTC 29 code. GPC has power on A...