Mechanics

HEATER

1996 GMC Truck • 6 cylinder 2WD Automatic • 130,000 miles

Heater doesnt work on my 1996 gmc sierra truck 1500 4.3 I have already replaced blender door accuator and still doesnt work when I turn heat on it blows heat a second then cold air
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Pawpaw49
January 12, 2011.




At engine operating temp, quickly touch the two heater core hoses on firewall. If one is hot and one warm/cold, then heater core is blocked.

Mmprince4000
Jan 12, 2011.


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