GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 GMC K Pickup - 4WD 🢒 Body and Accessories 🢒 Data Link Communications 🢒 Transfer Case Control Component Views
Figure 1:

Selectable Transfer Case Wiring
Object Number: 583129 Size: MF
(1)Engine Harness
(2)Connector C120
(3)Vehicle Speed Sensor to Engine Harness
(4)Shift Motor Power
(5)Vehicle Speed Sensor
(6)Encoder Connector
(7)Transfer Case Switch
(8)PNP Switch
Figure 2:

Transfer Case Select Switch
Object Number: 183948 Size: LF
(1)Radio Connector
(2)Rear Wiper Switch
(3)Cargo Lamp Switch
(4)Rear Fan Switch
(5)Electric Shift Transfer Case Switch or Fog Lamp Switch
Figure 3:

C100, C140, C142, P100
Object Number: 634900 Size: MF
(1)Pass Through Grommet P100
(2)Connector C100
(3)Engine Harness
(4)Connector C140
(5)Connector C142
Figure 4:

Front Axle Actuator Wiring
Object Number: 601510 Size: LF
(1)Transfer Case Harness
(2)Starter
(3)Battery Cable
(4)Front Differential
(5)Actuator Motor
(6)Actuator Connector
(7)Frame