blower resistor or maybe a fuse Thanks
My AC was only working on 4 and 5 last night is stopped working, could it be the on 2003 Chevrolet Silverado 1500
Check all the fuses first. If they are good, pull the blower resistor module out and check it for burn marks or melted/bubbled plastic. If it is good, it could be a bad HVAC Control Module, but you will need a scan tool (not just a code reader) to check that. Also check the power and grounds into and out of the HVAC Control Module.