GM 19151965
Dash Control Unit

Lift the blower switch knob off by using a flat bladed tool with care. After that, gently take off the rear trim plate from the console and unscrew the screws that fasten the rear blower switch. Take off the electrical connector and take out the rear blower switch. First, attach the electrical connector to the rear blower switch, then place the switch onto the trim plate and hold it in place with the screws. After that, put the rear console trim plate back on.

To service the control assembly; sometime consider removing the radio and HVAC control assembly first, then the nuts from the bracket which goes across joining the radio and HVAC control assembly. Next, mount the HVAC control assembly to the radio brackets, using the right fastener in the right place, as replacement fasteners should correspond to the part number for that application. The service procedure will identify any fasteners which need replacement or-thread locking compound or sealant. Do not use paints, lubricants, or corrosion inhibitors for use on the fasteners or the joint surfaces as such things affect the torque and the clamping force, which may ruin the fastener. Obey the correct sequence and specs to avoid breaking parts and systems. Next, install nuts and tighten them to 6 N.m (53 lb in) and replace radio and hvac control assembly.

The first step in changing the auxiliary blower motor switch is to gently pop out the blower switch knob with a flat blade screwdriver. Now, take out the trim plate from the console and unscrew the screws that secure the rear blower switch. Carefully unplug the electrical connector and take out the rear blower switch. Connect the connector to the blower switch, insert the switch into place and fasten it in the trim panel using the screws. Replace the rear console trim panel in its final position.

Reinstall the radio and the HVAC control module, and recalibrate the actuators.

Reinstall the radio and the HVAC control module, and recalibrate the actuators.