For most GM trucks or SUV's, it's under/behind the glove box. But the most GM motors do not have multiple speed capacity. That is usually a function of the switch. Many of the GM multi speed vehicles use the heater function switch assembly to control motor speed. Unfortunately, many of them are "solid state" and require that the entire heater function switch be replaced when something goes bad.
Heater blower resistor is what controls the low medium high speeds...
You have a relay located behind the glove box once removed to the left and you also have a blower resister that controls the speeds located on the passengers side in the blower motor housing..............
you need a new rheostat !
The relay for only the high speed blower function is located in the fuse and relay center under the hood. The resistor for the blower motor lower speeds is located under the hood, passenger side, on the firewall close to the blower motor.
Yes, located in the blower motor resistor pack. Follow the wires backward from the blower motor to find it.
A bad heater blower motor resistor would effect one or more blower speeds other than high.
blower resistor especially if its chrysler/jeep or blower switch
Probably the blower motor speed resistor is partially burned out.
usually the blower motor resistor pkg. located on or near the blower motor
Resistor on the heater blower motor has failed
The blower motor speed resister is burned out. This part is available from your local auto parts stores. The resister is located in the engine compartment, on the firewall, on the passengers side.
The blower motor resistor that sits behind the blower motor itself all the way against the firewall.