HEATER

1996 GMC Truck

Tiny

pawpaw49

January, 12, 2011 AT 3:20 PM

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

FOUND 6257 RELATED QUESTIONS

No Heat

37 ANSWERS
5 IMAGES

1 Answer

Tiny

mmprince4000

January, 12, 2011 AT 3:26 PM

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.

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