WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect the electrical connector (3).
Remove the blower motor resistor mounting screws (1).
Remove the blower motor resistor (2) from the blower case.
Fig 1: Removing Blower Motor Resistor From Blower Case