Thread: 2003 Grand Prix SE (Rare 3.1litre) AC/Heater working in level 5 only. Anyone help

It's the blower motor resistor.

Common issue.

Crawl under the passenger side and remove the motor assembly and swap out the resistors.

I think they're like $40 bones.

Originally Posted by bala

2003 Grand Prix SE (yeah the JUNK 3.1litre) AC/Heater working in level 5 only.

Can anyone help to identify and fix the issue

Fixed that for you but yeah it's the blower motor resistor.