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Well, my GMC 6.5 deisel is running now ! Thanx for all your help and advice; I was able to figure out my problem. Approximately 4 years ago i tore up my ring gear and starter because i sparyed either into my 6.5 , won't do that again, and because my heart started beating over 300 times a...

Thanx , I am going out now to check on the GP relay . Will let you know how thingsw turn out . Thank you again Randy

Thanx Don, your info is a big help and i am going out to look at all the things you pointed out. I agree with you on everything you said and i too think you are very possibly correct about the glow plug relay sticking open. Your info is Greatly appreciated and thank you again. Randy

I will ck that out too and will try to get some pics on. Still slow at navigation this system. Thanx again....

thanx man, i will ck that out. Do you by chance know where the GP relay is and the starter relay ?? I love this old GMC or i would go looking for something else. Greatly Appreciate any advice, thanx

starter wiring problem thanx for your reply. my starter actualy has 3 wires: 1) wire is the big wire comming from the battery, 2) wire is a fusible link that is connected by a large crimbed connection with 4 other fusable linkwires, 3) wire ,i think, goes to the starter relay and possible...

I am trying to find out where the fusible link connects on the starter as well as the other wire. If anyone has any information it would be greatly appreciated. The wiring diagram is very hard to read and a bit vague.