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

Headlamps, LH (RH Typical)
Object Number: 468823 Size: MF
(1)Headlamp (Export)
(2)Headlamp (Composite)
(3)Marker Lamp
(4)Park/Turn Lamp
(5)Headlamp, Low Beam
(6)Headlamp, High Beam
Figure 2:

Headlight Composite, LH/RH Typical (Luxury)
Object Number: 468446 Size: MF
(1)Headlamp
(2)Marker Lamp
(3)Park/Turn and Marker Lamp Lenses
(4)Park/Turn Lamps
(5)Grille
Figure 3:

Fog Lamps
Object Number: 278124 Size: MF
(1)Fog Lamp (Rear View)
(2)Forward Lamp Harness
(3)Fog Lamp Connector
Figure 4:

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

Connectors: C107, C120 (5-Speed Manual)
Object Number: 276778 Size: MF
(1)C120
(2)C107
Figure 6:

DRL Module, Stoplamp Switch
Object Number: 278093 Size: MF
(1)Daytime Running Lamps (DRL) Module
(2)Ignition Switch
(3)Brake/Transmission Shift Interlock (BTSI) Solenoid
(4)Stoplamp Switch
(5)Daytime Running Lamps (DRL) Diode
Figure 7:

Convenience Center
Object Number: 278144 Size: MF
(1)Convenience Center
(2)Audio Alarm Module
(3)Turn/Hazard Flasher
(4)DRL Relay
(5)Fog Lamp Relay
(6)Park Brake Warning Switch
Figure 8:

Interior Lamp Control Module
Object Number: 278106 Size: MF
(1)Remote Control Door Lock Receiver Module
(2)Interior Lamp Control Module
(3)Transfer Case Control Module
Figure 9:

Headlamp Control Module
Object Number: 311392 Size: MF
(1)Cross Body Harness
(2)Door Lock Relay
(3)Headlamp Control Module
(4)Headlamp Control Module Connectors, C1 and C2
Figure 10:

Fog Lamp Switch
Object Number: 331841 Size: MF
(1)Forward Lamp Harness
(2)Fog Lamp Switch
Figure 11:

Emergency Roof Lamp Switch (Z56)
Object Number: 278134 Size: MF
(1)Emergency Roof Lamp Switch
Figure 12:

Turn Signal and Hazard Switch
Object Number: 468790 Size: MF
(1)Inflatable Restraint Steering Wheel Module Connector
(2)Steering Column
(3)Tilt Lever
(4)Turn Signal Lever
(5)Emergency Flasher Switch
(6)Steering Wheel
Figure 13:

Spotlamp (Police Package)
Object Number: 375593 Size: MF
(1)Spotlamp Connector, Right Side
(2)Spotlamp Harness
(3)Crossbody Harness
(4)Spotlamp Harness
(5)C272
(6)Spotlamp Connector, Left Side
(7)Spotlamp, Left
Figure 14:

Sunshade Mirror Lamp
Object Number: 314703 Size: MF
(1)Sunshade Mirror Lamp, Left (Right Opposite)
Figure 15:

Connectors: C300, C307 (Overhead Console)
Object Number: 375523 Size: MF
(1)Front-to-Rear Body Harness
(2)C307
(3)Dome Lamp Connector, Front
(4)Auxiliary HVAC Control Module Harness
(5)Dome Lamp Connector, Front
(6)Dome Lamp Harness
(7)Garage Door Lamp Switch
(8)Auxiliary HVAC Control Module Connector, Front
(9)Overhead Console Harness
Figure 16:

Dome Lamp (Z56)
Object Number: 278142 Size: MF
(1)Wiring Harness
(2)Dome Lamp Connector
(3)Dome Lamp (Z56)
(4)Dome Lamp Lens
(5)Windshield
Figure 17:

Roof Marker Lamps
Object Number: 376143 Size: MF
(1)Clearance Lamps Harness, Roof
(2)Clearance Lamps Harness, Roof
(3)C271
(4)Clearance Lamp Connector
(5)Clearance Lamp Harness, Roof
(6)Clearance Lamp
Figure 18:

Courtesy Lamp, All Doors
Object Number: 375560 Size: MF
(1)Courtesy Lamp, Door
(2)Courtesy Lamp Connector
(3)Door Harness
Figure 19:

Crossbody Harness Inline to RR Door (LR Typical)
Object Number: 376164 Size: MF
(1)Crossbody Harness
(2)Door Jamb Switch, RR/LR
(3)C496 & C497 (RR)/C498 & C499 (LR)
(4)Crossbody Harness
(5)Crossbody Harness
Figure 20:

Rear Dome Lamp
Object Number: 278139 Size: MF
(1)Rear Dome Lamp
Figure 21:

Clearance Lamps (with Dual Rear Wheels)
Object Number: 278167 Size: MF
(1)Left and Right Front Clearance Lamp
(2)Left and Right Rear Clearance Lamp
(3)Fuel Gauge Sender (w/Dual Tanks-Diesel) (Dual Tanks-Gasoline)
(4)Fuel Pump Balance Relay
(5)Fuel Pump Balance Module
(6)Fuel Pump (Dual Tanks-Diesel)
(7)Primary Fuel Tank
Figure 22:

Center High Mount Stoplamp and Cargo Lamp (except Utility)
Object Number: 277171 Size: SH
(1)Bolt
(2)Center High Mount Stoplamp Lens
(3)Base
(4)Socket
(5)Center High Mount Stoplamp Connector
(6)Insulators
(7)Center High Mount Stoplamp Mount
Figure 23:

Center High Mount Stoplamp Wiring (Utility)
Object Number: 277175 Size: SH
(1)Center High Mounted Stoplamp Lens
(2)Bolt
(3)Cendter High Mount Stoplamp Mount
(4)Center High Mount Stoplamp Connector
Figure 24:

Door Jamb Switch, Liftgate Right Rear
Object Number: 278002 Size: LH
(1) Door Jamb Switch, Liftgate RR
Figure 25:

Cargo Door Wiring (Right Side)
Object Number: 277850 Size: MH
(1)Cargo Door Contactor and Door Jamp Switch
(2)P900
(3)Cargo Door Lock Actuator
(4)Cargo Door Lock Actuator, Connector
(5)Rear Window Defogger Connectors
(6)P901
Figure 26:

Tail/Stop Lamp, LH (RH Typical)
Object Number: 468323 Size: MF
(1)Tail Lamp Assembly (Rear View)
(2)Tail Lamp Connector
(3)Tail Lamp Harness
(4)Tail Lamp Assembly (Front View)
(5)Backup Lamp
(6)Tail Lamp Harness
Figure 27:

Endgate Marker Lamps
Object Number: 375553 Size: MF
(1)C408
(2)Endgate Marker Lamps
Figure 28:

Tail and Stoplamp Harness Connectors
Object Number: 375538 Size: MF
(1)Tail/Stop Lamp Extension Harness
(2)Tail/Stop Lamp Harness
(3)Tail/Stop Lamp Connector, RH
(4)License Plate Lamp Harness
(5)License Plate Lamps
(6)C409
(7)C407
Figure 29:

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 30:

License Lamps (Cab/Chassis)
Object Number: 278099 Size: MF
(1)License Lamps