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Air conditioning heater control will only work on 4 and 5. How can I fix this?

(2003 Chevrolet Suburban 1500)
in Mount Washington, KY on July 01, 2014
Do I need to replace entire control module?
Displaying 3 answers & 0 comments
Popular Answer
of Melvindale Car Care on July 01, 2014
the blower switch or blower resistor they both control the blower motor speed.
on July 01, 2014
I agree, check the switch and resistor.
on July 01, 2014
I agree, check the switch and resistor.
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