Heater fan problem.

My '03 Envoy has a fan knob with six speeds. 1-3 don't work at all. 4-6 work fine. I really don't care to run it at four all the time.

Anybody run into this?

You need a new Blower Motor Resistor. Put those words in the site search box above and you will get plenty of info including location and replacement instructions.

C.B.

Thanks.