Coolant leaks most likely. Alternator looks good. Belt very old but looks OK. Not leaking coolant now clamps tight. Looks yellowy white like paint spray. Will send pictures.
Had to leave truck at GMC dealer. Mechanic found short on wire above the transmission 4l80e. Cost me 480.00! But had to do it. He was good. When I worked at the dealer only one guy was very good on electric. Gonna go shoot the shit with him on Sat.
I stopped it from blowing fuses. Wiggled wires under dash and by computer gently. Also on top of engine. Will add plastic sleeve on top old missing. drove slowly around town paying attention to shifts.
My electrical shop manual seems very condensed and overlapped between the 6.2 and the 6.5. can somebody provide me with a list of all the items on the ecm10 amp circuit?