This will let precious cold air or heat escape. This resistor mounts on the top of the heater/evaporator box on the firewall.
Heater AC Climate Control Switch Rear Defrost FOR GMC Jimmy Chevy Blazer 1999-01
04-08 Chevy Malibu Dash Manual Heater AC Temperature Control opt C60 OE 28014589
For 95-99 Chevy C1500 K1500 GMC Suburban C1500 Heater AC Blower Motor Resistor
Heater/AC Dash Control Panel Temperature Fit For 04-12 Chevy Colorado GMC Canyon
