GM 12471631 / Dorman 600-103 4-Wheel Drive Actuator is cheap but probably too weak for clutch.
The wire harness is gm 15306396 ACDelco PT1449 bluestreak sn74, superseded by gm# 19180287,PT2448,
I have the pin outs for the dorman activator 600-103 gm#12471631
Pin Outs
A-Apply Ground to extend , remove to retract (used a Green Wire )
B-constant ground (used Black wire
C-FeedBack supply 12V when Locked & fully extended (Used Blue Wire )
D-Power (Used Red Wire )