S10/T10 P/U 4WD V6-173 2.8L (1986)
Air Door Actuator / Motor: Service and Repair
Defroster Vacuum Diaphragm Replace
S/T-10/15
1.
Disconnect battery ground cable.
2.
Disconnect vacuum line and actuator linkage.
3.
Remove actuator retaining nut and actuator.
4.
Reverse procedure to install.
