Can anyone tell me the part number for a new AC delco blower motor? I don't want the knock offs. Unless you guys say they're just as good. My resistor was out when I got the truck so I've heard when that goes the motor is close behind. It works great at first but after a few hours if it's on constantly it smells funky and it starts getting weak. I have looked it the only thing I can find is on rock auto but the description is iffy whether or not it'll work or not