GM Service Manual Online
For 1990-2009 cars
Figure 1:

Instrument Panel Harness to Instrument Panel, Left Front


Object Number: 689504  Size: MF
(1)Windshield Wiper Motor
(2)Upfitter AUX WRG Connector, Exterior
(3)Trailer Stop Lamp Switch
(4)C107
(5)C113
(6)Differential Lock Switch
Figure 2:

Two Speed Rear Axle Driver Control Switch (Instrument Panel Mounted)


Object Number: 690040  Size: SF
(1)Rear Axle Driver Control Switch -- Two Speed
(1)Rear Axle Driver Control Switch -- Two Speed
(2)Instrument Panel
Figure 3:

Two Speed Rear Axle Driver Control Switch (Automatic Transmission-Console Mounted)


Object Number: 690042  Size: SF
(1)Rear Axle Driver Control Switch -- Two Speed
Figure 4:

Two Speed Rear Axle Driver Control Switch (Manual Transmission-Shift Lever Mounted)


Object Number: 690058  Size: SF
(1)Rear Axle Driver Control Switch -- Two Speed
Figure 5:

Two Speed Rear Axle Harness, Left Rear View


Object Number: 690061  Size: SF
(1)Rear Axle Shift Relay -- Two Speed
Figure 6:

Rear Differential, Front View


Object Number: 690066  Size: SF
(1)Rear Axle Shift Motor -- Two Speed