glow plug

  1. Jonathan_GMC

    6.2l diesel electrical problem!!!

    I have a 1986 GMC 6.2l diesel and my headlights are super dim. My low coolant light keeps coming on and glow plug light turns on sporadically. It will also return to normal voltages for a short period of time before it starts acting up again. I put a new alternator in and the truck and brand new...

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