2007 GMC Canyon Question: AC problem

If the fan isn't working at all and you have checked the fuses, you would need to start tracing the wiring diagram and look at the various relays and follow test procedures for the resistor pack and blower motor and fan controls. Autozone have some popular workshop manuals for free on line once you register (for free) on their website http://bit.ly/autozone_repair_info. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online