Info for this problem. I found some info on another site. I thought I would post info incase somebody needed info.
Looks like when you have the electronic climate control you dont have the resistors under the dash. You have a blower control module. this module had a number (1p)52495874 on it. Blower plugged into it and another plug went to fuse panel.
Opened up the module and found nothing I could fix or replace. Have to order a new one.
Found part number 52495874 online at gmpartsdirect.com they sub'd to part number 89018778. Must have found an issue
with the old part. Imagine that! Ordered part. will post info once i test new part.
price was about 75 bucks with shipping.
FYI.... to remove, remove three screws holding the cover under the dash of pass side. One screw was really hard to get out.
once cover is off, fan and module can be seen. two screw hold module in and come right out. fan plug was hard to figure out. so after standing on my head, the fan comes right out. just had to pull on a lock tab and twist motor. came right out. unplugged fan and reinstalled. module had a heat sink that when installed goes up into the air path. I guess to sense the air temp for the auto climate control? unpluged the module and battery was fine this morning.