GMC Repair: 2005 Buick Lacross A/C, 2005 buick lacross, blower motor resistor

Question
Fan will not turn on checked all fuses all Ok digital readout works shows Ok found 3 relays marked fan 1,2,3 not sure if they work the the heater or just the motor fans. where do they hide the heater motor. thanks for any help you can give Don

Answer
I am assuming you mean the Blower Motor inside the vehicle is not operating?
If so I would highly suspect the Blower motor resistor (aka the blower module) which is located passenger side under glove box. It will have 2 sets of wires going to it 1 set goes to the blower motor itself.
You can check power and ground going to the blower motor from this module (resistor)
They are fairly common to burn out and pretty easy to replace (2 small bolts and 2 wire connections)
The relays are for the radiator fans to blow at different speeds.
Thanks