GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Sierra - 4WD 🢒 Engine 🢒 Engine Controls - 4.8L, 5.3L, and 6.0L 🢒 Transfer Case Control Component Views
Figure 1:

Transfer Case Harness Routing (Manual)
Object Number: 310210 Size: LF
(1)Vehicle Speed Sensor (VSS) Adapter
(2)Transfer Case Switch Connector
(3)VSS Connector
(4)M Transfer Case
(5)Harness Brackets
(6)Left Frame Rail
(7)Crossmember
(8)Fuel Line Bracket
Figure 2:

Front Drive Axle Harness Routing (K25 Series)
Object Number: 310212 Size: LF
(1)Ground 110 (G110)
(2)Vent Tube
(3)Vent Tube Connection
(4)Front Axle Actuator/Switch
(5)Front Axle Actuator/Switch Connector
(6)Left Inner Fender
Figure 3:

Front Drive Axle Harness Routing (K15 Series)
Object Number: 310214 Size: LF
(1)Vent Tube
(2)Vent Tube Connection
(3)Front Axle Actuator/Switch
(4)Front Axle Actuator/Switch Connector
(5)Front Drive Axle Assembly (Mount)
(6)Ground 110 (G110)
(7)Left Inner Fender