Asked in GMC Sierra
GMC Sierra

Why do only things that work on my climate control on a 1995 Sierra 1500 are the first 3 blower settings and temperature control and nothing else?



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dont know if your air works but my low speeds only worked on my 1995 gmc sierra and i found out there was a relay on top of the heater box after i took out the glove box. this works the high speed blower mode on the control switch. the low speeds are controlled by the blower resistor. the relay cost me about 15.00 at autozone.