GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 Yukon - 2WD 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Lighting Systems Component Views
Figure 1:

Hood
Object Number: 310026 Size: MF
(1)Hood
(2)Hood Reinforcement
(3)Underhood Lamp Assembly Electrical Connector
(4)Underhood Lamp Assembly
(4)Underhood Lamp Assembly
Figure 2:

LF Corner of the Bumper
Object Number: 350006 Size: MF
(1)Bumper
(2)Fog Lamp - LF
(3)Air Deflector
(4)Fog Lamp - LF Connector
(5)Fog Lamp Harness
(6)Fog Lamp Bracket (Part of Fog Lamp)
Figure 3:

RF Corner of the Vehicle -- Lighting Components
Object Number: 310805 Size: MF
(1)Upper Radiator Support - Tie Bar
(2)Headlamp-Low Beam - Right
(3)Snowplow - Option - Connector C127
(4)Park/Turn Signal Lamp - RF
(5)Park/Turn Signal Socket - RF
(6)Park/Turn Signal Lens - RF
(7)Marker Lamp Socket - RH
(8)Daytime Running Lamp (DRL) Socket - RH
(9)DRL Lamp - RH
(10)DRL Lens - RH
(11)Headlamp Assembly - Right
(12)Headlamp-High Beam - Right
Figure 4:

LF Corner of the Vehicle -- Lighting Components
Object Number: 310802 Size: MF
(1)Upper Radiator Support - Tie Bar
(2)Headlamp Assembly-LF
(3)Headlamp-High Beam Connector-LF
(4)Daytime Running Lamp (DRL)-LF
(5)DRL Socket-LF
(6)Windshield Washer Reservoir
(7)Park/Turn Signal Lamp Socket-LF
(8)Marker Socket-LF
(9)Marker Lamp-LF
(10)Park/Turn Signal Lamp-LF
(11)Snowplow - Option - Connector C125
(12)Headlamp-Low Beam Connector-LF
(13)Marker Lens-LF
Figure 5:

Center Rear of the Roof (Pickup)
Object Number: 350025 Size: MF
(1)Center High Mounted Stop Lamp (CHMSL)
(2)CHMSL Connector
(3)Roof
Figure 6:

Roof Lamps
Object Number: 327891 Size: MF
(1)Lamp Assembly
(2)Lamp Assembly Socket
(3)Lamp Assembly Harness
(4)Lamp Assembly Nuts
(5)Bulb
(6)Roof Marker Lamp - Right
(7)Clearance Lamps
(8)Roof Marker Lamp - Left
Figure 7:

Steering Column Components
Object Number: 349986 Size: LF
(1)Hazard Button
(2)High Beams/Cruise/Wiper/Washer
(3)Cruise Control Switches
(4)Tilt Steering Actuator
(5)Inflatable Restraint Harness
(6)C201 Inline Connector
Figure 8:

Left Side of the I/P -- Switches
Object Number: 310113 Size: MF
(1)Automatic Transfer Case (ATC) Electrical Connector
(2)Automatic Transfer Case (ATC) Electrical Connector
(3)Automatic Transfer Case (ATC) Select Switch
(4)Cargo/Fog Lamp Switch
(5)Headlamp and Panel Dimmer Switch
(6)Instrument Panel
(7)Headlamp and Panel Dimmer Switch Electrical Connector
(8)Cargo/Fog Lamp Switch Electrical Connector
Figure 9:

Lower Left Side of the I/P Components
Object Number: 310145 Size: MF
(1)Fuse Block-Left I/P Connector
(2)Body Control Module (BCM) Connectors
(3)Splice Pack SP205
(4)Fuse Block-Left I/P
(5)Data Link Connector (DLC)
(6)Courtesy Lamp-Left
(7)Courtesy Lamp Socket-Left
(8)Support to Dash-Left
(9)Right Windshield Pillar Trim Panel
Figure 10:

Center of the I/P -- Accessory Switches
Object Number: 350001 Size: LF
(1)Fog Lamp Switch
(2)Roof Beacon Switch
(2)Roof Beacon Switch
(3)Accessory Switch Housing
(3)Accessory Switch Housing
(4)Instrument Panel
Figure 11:

Lower Center of the I/P Components
Object Number: 310152 Size: MF
(1)Ashtray Lamp Socket
(2)Bulb
(3)Ashtray Lamp Shield
(4)Instrument Panel
(5)Accessory Power Outlet
(6)Cigar Lighter Assembly
Figure 12:

Instrument Panel Compartment Lamp
Object Number: 350014 Size: MF
(1)Instrument Panel
(2)Instrument Panel Compartment Lamp and Switch
Figure 13:

Dome/Reading Lamp (Regular Cab)
Object Number: 350012 Size: MF
(1)Overhead Console
(2)Dome/Reading Lamp
(3)Dome/Reading Lamp Electrical Connector
Figure 14:

Overhead Console (Extended Cab)
Object Number: 350007 Size: MF
(1)Headliner
(2)Overhead Console
(3)Overhead Console Electrical Connector
(4)Headliner Harness Electrical Connector
Figure 15:

Driver Door Panel Components -- Courtesy Lamp
Object Number: 350018 Size: MF
(1)Door Courtesy Lamp Electrical Connector
(2)Door Courtesy Lamp
(3)Left Door
Figure 16:

Manual Transmission (Heavy Duty)
Object Number: 310252 Size: MF
(1)Backup Lamp Switch Connector
(2)Speed Sensor
(3)Speed Sensor Connector
(4)Backup Lamp Switch
Figure 17:

Manual Transmission (Light Duty)
Object Number: 310254 Size: MF
(1)Speed Sensor
(2)Transmission Crossmember
(3)HO2 Sensor Bank 1 Sensor 2 Connector
(4)Backup Lamp Switch Connector
(5)HO2 Sensor Bank 1 Sensor 1 Connector
Figure 18:

External Components
Object Number: 310233 Size: LF
(1)Vehicle Speed Sensor
(2)Harness Connector
(3)Backup Lamp Switch Connector (Part of the Park/Neutral Position Switch)
(4)Park/Neutral Position Switch Connector
(5)Input Shaft Speed Sensor Connector
(6)Park/Neutral Position Switch
Figure 19:

Rear of the Vehicle Components (Pickup)
Object Number: 350027 Size: MF
(1)Rear Cross Sill
(2)Right Tail/Stop-Turn Lamp
(3)Right Taillamp Harness
(4)Bed to Sill Reinforcement
(5)Rear Lamp Harness Connectors
(6)Left Taillamp Harness
(7)Left Tail/Stop-Turn Lamp
(8)Rear Lamps Bussing Block
Figure 20:

Rear Bumper (Utility)
Object Number: 623140 Size: MF
(1)Rear Bumper
(2)Tail Lamp Jumper Harness
(3)Junction Block Connector C3
(4)License Plate Lamp-RH (LH similar)
Figure 21:

Center of the Rear Bumper (Pickup)
Object Number: 309881 Size: MF
(1)Lamp Socket
(2)Bulb
(3)RH License Lamp
(4)Bumper
(5)LH License Lamp
(6)Rear Cross Sill
(7)Rear Lamps Bussing Block-Pickup only
Figure 22:

License Lamp (without Bumper)
Object Number: 350024 Size: MF
(1)Frame
(2)License Lamp Electrical Connector
(3)License Lamp
Figure 23:

Trailer Wiring Harness
Object Number: 349960 Size: MF
(1)Trailer Wiring Connector
(2)Trailer Wiring Receptacle
(3)Frame
(4)Trailer Hitch Receiver
Figure 24:

LR Frame -- Camper Provision
Object Number: 309959 Size: MF
(1)Camper Wiring Harness
(2)Frame
(3)Camper Wiring Harness Connector