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Your correct about this problem. GM had this issue for several years in the 1980's with quite a few trucks. I have just installed a higher amp relay in all the 1980's GM trucks I have owned ( 5 now) . Another major problem GM had with their starters was "heat soak" . Shut off the vehicle after...

How many guys is "Paycheck" sending private messages to ? I told him I would post all my responses here on the main forum. That way it will benefit the whole community when he finally fixes it.

I took a look at the pictures you sent me. First off those battery cables need to be replaced. I can guarantee that there is corrosion at the connectors and brittle metal due to over heating. I would go with a larger cable size too. At the minimum I would use #2 cable. Also check the resistor...

This is what our bus batteries look like. They are in 12V and 24V circuits with a Vanner battery equalizer to maintain proper charging. There are 8 separate battery cables. Needless to say there is a wiring diagram on the battery door. A few years ago one of our mechanics was in a hurry and...

I know your tired and really frustrated with this truck, but just take a couple of days off and let your mind relax. I'm a mechanic or was before I retired and there where times I would just have to step back and let a problem go away for a time or even have another mechanic take over. After you...