Heater blowing cold air

5

Asked by Nov 23, 2016 at 03:50 PM about the 1996 GMC Sierra 1500 C1500 SL Extended Cab Stepside SB

Question type: Maintenance & Repair

1 Answer

6,515

Make sure thermostat is working properly, coolant circulating through the heater core and heater diverter gate is actually opening

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