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Re: 1999 isuzu NPR / GM 5.7 model
Posted to HD/Fleet Forum on 1/13/2009

thanx for the insight dave. i have been kickin this truck around for several days working on it in between other things. i found a short to ground on the hvac blower relay coil positive (key on) ckt. i simply clipped it and pulled the pwr from an unused relay ... Login to read more.