Mechanics

SIERRA 1500 PICKUP (NOT BLOWING HEAT)

1995 GMC C1500

Hello

I have the following truck above. I have no heat blowing and I did the following already.

Replaced the thermostat
Replaced the coolant temp plug

There is no buildup on the window from the heater coil or any water on the bottom anywhere.

The hoses are hot

Someon told me maybe my whole heater control unit needs replacing becuase when you select the control to either go to vent or bottom it only blows on the defrost part. The 2 butttons for a/c or recircluation do not light up when you press them. However the low, med, high knob works fine but again only blow cold air onto the winshied. Before I goto to the junkyard and waste money does anyone have any ideas.

Thanks for reading this

Mike
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Avatar
Mikey11
December 27, 2006.




I had an 88 chevy with the same problem. Replaced the heater core, and solved the problem.

Tiny
A-train
Feb 25, 2007.


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