no heat both lines are hot

Asked by jayman2018 Nov 24, 2018 at 10:36 AM about the 1988 GMC Sierra 1500 C1500 Standard Cab LB

Question type: Maintenance & Repair

in a 1988 gmc there is no heat coming in the cab
but both lines are hot but i do have a humming
sound when i turn on the fan

2 Answers

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