i had a 03 Chevrolet Colorado, and the resitor was located under the glove compartment, where the motor blower is, the resistor is screwed to the side of the blower. hope this works for you. the resistor is usually located there.
You'll find the heater blower motor resistor in the heater/air conditioner compartment. This compartment is location underneath the dashboard. This is the part that allows the heater blower motor to change the fan's speed.
The blower motor resistor is under the glove box. There's a plastic cover over it. You remove the cover and you'll see a connector that is plugged into the resistor. You can see pictures at www.timsjeepblog.com.