heater

Asked by blaney2018 Jan 31, 2016 at 06:23 PM about the 2000 Chevrolet Blazer LT 4-Door 4WD

Question type: Maintenance & Repair

The heat in my blazer only blows cold air unless
I'm on the highway then it works fine. Don't want
to but my parts until I know what to get. Any of you
know what I should do?

6 Answers
223,935

Rowefast answered 8 years ago

There is a AC Panel Mode Door Actuator that looks like it is vacuum operated that may have a bad vacuum line running to it or its just bad, and there is a AC,Heater Vacuum Check Valve you may want to check out.

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