Mechanics

HEATER BLOWING COLD AIR

2001 GMC Sierra

Heater problem
2001 GMC Sierra V8 Two Wheel Drive Automatic 150, 00 miles

2001 gmc 150000 miles heater does not blow warm air. Blower moter working on all speeds. Engine tempature normal.
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M.zeller
April 6, 2010.



Check heater hoses by the fire wall if both hot suspect blend door and or its actuator

If hoses not hot or one cool suspect heater core clogged

BMRFIXIT
Apr 6, 2010.