GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Pickup - 4WD 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 Power and Grounding Component Views
Figure 1:

Auxiliary Power Outlet Rear
Object Number: 312732 Size: MF
(1)Front to Rear Harness
(2)Auxiliary Power, Rear Connector
(3)Auxiliary Power Outlet, Rear
Figure 2:

Underhood Lamp
Object Number: 405594 Size: MF
(1)Underhood Lamp
(2)G108
(3)Underhood Lamp Connector
(4)Engine Harness
(5)P101
Figure 3:

Ground G113
Object Number: 405727 Size: MF
(1)G113
Figure 4:

Taillamp Harness (Cab Chassis)
Object Number: 405724 Size: MF
(1)G401
(2)Auxiliary Fuel Tank (Dual Tanks Only)
(3)Tail/Stop Lamp Harness
(4)Tail/Stop Lamp Connector, LH
(5)Tail/Stop Lamp Assembly, LH
Figure 5:

Taillamp Harness (w/Trailier Harness, Except Cab Chassis)
Object Number: 375529 Size: MF
(1)Ground Harness
(2)G401
(3)Tail/Stop Lamp Harness
(4)Tail/Stop Lamp Connector, RH
(5)License Plate Lamp Harness
(6)Rear Extension Lamp Harness
(7)License Plate Lamp, RH
(8)Tail/Stop Lamp Harness
(9)C409
(10)License Plate Lamp Harness
(11)C407
(12)License Plate Lamp, LH
(13)Tail/Stop Lamp Connector, LH
Figure 6:

Grounds G104 and G105 (Diesel)
Object Number: 374092 Size: MF
(1)G105
(2)G104
(3)Ground Strap
(4)Engine Harness
Figure 7:

Engine Harness, Right Rear (5.0L/5.7L)
Object Number: 461190 Size: MF
(1)Transmission Filler Tube
(2)Engine Manifold, RH
(3)C107
(4)4WD Harness
(5)Engine Exhaust Harness
(6)G110
(7)Ground Strap
(8)G104
Figure 8:

Secondary Air Injection (AIR) Pump, G115 (L31)
Object Number: 276736 Size: MF
(1)G115
Figure 9:

Engine Harness, Front (7.4L)
Object Number: 461193 Size: MF
(1)G104
(2)A/C Low Pressure Cutout Switch
(3)A/C Compressor Clutch
(4)Engine Coolant Temperature Sensor
(5)G103
(6)Generator
(7)Manifold Air Pressure Sensor
(8)Throttle Position Sensor
(9)Intake Air Temperature Sensor
(10)Engine Harness
Figure 10:

Mega Fuse
Object Number: 461185 Size: MF
(1)Fan Shroud
(2)Battery, RH
(3)Engine Harness
(4)Heater Hose
(5)Generator Harness
(6)Mega Fuse
Figure 11:

Ground G105 (Gas)
Object Number: 276742 Size: MF
(1)G105
Figure 12:

Ground G300 (Pick-Up)
Object Number: 277052 Size: MF
(1)G300
Figure 13:

Underhood Fuse Block
Object Number: 374115 Size: MF
(1)Battery Cable
(2)Underhood Fuse Block
(3)Engine Harness
(4)EBCM
(5)Remote Battery Stud
Figure 14:

Fuse A and Fuse B (Police Package)
Object Number: 376127 Size: MF
(1)Fuse A
(2)Fuse B
(3)Negative Battery Cable
(4)Positive Battery Cable
(5)Battery Cable Harness
Figure 15:

IP Harness, Left Rear View
Object Number: 376140 Size: MF
(1)Headlamp and Panel Dimmer Switch
(2)Door Jamb Switch, LH
(3)IP Fuse Block
(4)Courtesy Lamp, LH
(5)G200
(6)G201
(7)C100
(8)DRL Module
(9)C227
(10)IP Cluster Connector
Figure 16:

Ground G103 (Gas, Except 7.4L)
Object Number: 405860 Size: MF
(1)EGR Valve Electrical Harness
(2)G103
Figure 17:

Grounds G101, G102, and G103 (Diesel)
Object Number: 405858 Size: MF
(1)G101
(2)G102
(3)G103
Figure 18:

HVAC Harness, Bulkhead, Right Side
Object Number: 461812 Size: MF
(1)Crossbody Harness
(2)G202
(3)C299
(4)Right Door Harness Connectors
(5)HVAC Plenum
(6)Crossbody Harness
Figure 19:

Rear Body Harness
Object Number: 372228 Size: MF
(1)CHMSL Connector
(2)C402
(3)C303
(4)Speaker Connector, LR
(5)Front to Rear Body Harness
(6)C314 (Liftgate)
(7)C405 (Cargo Doors)
(8)C406 (Liftgate)
(9)Speaker Connector, RR
(10)C406 (Cargo Doors)
(11)Door Lock Switch Connector, Rear
(12)Door Lock Actuator Connector, Rear
(13)G400
(14)Auxiliary Power Connector, Rear
(15)Door Jamb Switch Connector, Rear (Liftgate)
(16)C406 (Cargo Doors)
(17)Door Jamb Switch Connector, RR (Cargo Doors)
Figure 20:

Fuel Pump and Sender (Single Tank)
Object Number: 372212 Size: MF
(1)G404
(2)Fuel Tank
(3)Fuel Tank Sender connector
(4)Fuel Pump connector
(5)G404
(6)Fuel Pump and Sender connector (Diesel)
(7)Rear Lamp Extension Harness
(8)Fuel Pump and Sender Assembly