There is no fan front or back for any setting or fan speed. Everything died all at once. I’m wondering what to do to identify the problem if it’s not obvious. Any advice is a big help. 2001 Chevy suburban LT. controls for back heat and A/C are overhead. Changing the front fan speed selector *** from 1-2-3-4-5 there is a clicking sound.

 

If both front and rear blower motors stopped at same time, I'd check fuses for AC.

 

Fuses are good. I checked in engine bay and side of dash.

the back was out by itself a while ago but fixed itself. Let’s assume front and back aren’t related. What all do I need to check? Motor, resistor, controller? How? Anything else?

 

You can turn on the AC system and check for positive voltage at both the front and rear blower motors.

 

There’s 14V at the front blower motor at all fan speeds except off which is 0V. Guess I’m have my answer, bad blower motor, right?

Haven’t messed with rear yet, but I’ll save that for another day.

 

Sure sounds like bad blower motor to me. If mine, I'd pull the blower motor and confirm with jumper cables/jumper wires to the battery.

 

Thanks for the help!!