GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 TopKick C-Series (Crew) C6/C7/C8 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Lighting Systems Component Views
Figure 1:

Backup Alarm Siren, C412, Tail Lamp - Left, Right
Object Number: 953510 Size: LF
(1)Backup Alarm (UZF)
(2)S410
(3)C412
(4)Tail Lamp Assembly - Right
(5)S411
(6)Tail Lamp Assembly - Left
Figure 2:

Center and the Right I/P
Object Number: 1430017 Size: LF
(1)Marker Lamp Switch (RQ2 and U86 or RQ2)
(2)High Idle Switch (UF3)
(3)Traction Control Switch (NW9)
(4)Outside Heated Mirror Switch (DB6/DB8)
(5)Exhaust Brake Switch (K40)
(6)Rear Axle Driver Control Switch - Two Speed (HPZ/Automatic Transmission)
(7)Air Suspension Dump Switch (G40/G45/GSJ)
(8)Power Take-Off (PTO) Switch
(9)Driver Information Center (DIC)
Figure 3:

Center of Roof
Object Number: 826836 Size: LF
(1)Dome and Reading Lamps
(2)Body Harness
Figure 4:

Front Left of the I/P
Object Number: 826805 Size: LF
(1)Radio
(2)Park Brake Release Switch
(3)HVAC Control Module
(4)Overdrive Defeat Switch
(5)Headlamp Switch
(6)Instrument Panel Cluster
Figure 5:

Air Compressor (K16), Fuel Tanks and Trailer Connector (RQ2 and U86 or RQ3)
Object Number: 1014827 Size: LF
(1)Splice Pack SP400 (Ground Block)
(2)C409 (8 cavities) Fuel Tank Harness to the Chassis Harness
(3)Fuel Pump (FP) Relay
(4)Fuel Sender - Secondary
(5)Fuel Tank Transfer Pump - Secondary
(6)Trailer Connector (RQ2 and U86 or RQ3)
(7)C410 (3 cavities - K16) Chassis Harness to the Air Compressor Harness
(8)Air Compressor Connector (K16)
(9)Air Compressor Relay (K16)
(10)Air Compressor (K16)
(11)Fuel Sender - Primary
Figure 6:

Cab - Front View (V22)
Object Number: 1042004 Size: MF
(1)Outside Rearview Mirror - Passenger
(2)Headlamp - High Beam - Right
(3)Clearance Lamp - Right
(4)Identification (ID) Lamp - Right
(5)Identification (ID) Lamp - Center
(6)Identification (ID) Lamp - Left
(7)Clearance Lamp - Left
(8)Headlamp - High Beam - Left
(9)Outside Rearview Mirror - Driver
(10)Park/Turn Signal Lamp - LF
(11)Headlamp - Low Beam - Left
(12)Headlamp - Low Beam - Right
(13)Park/Turn Signal Lamp - RF
Figure 7:

I/P Harness
Object Number: 953447 Size: LF
(1)Fuse Block - Underhood (Secondary)
(2)Blower Motor Resistor Assembly (C40/C60)
(3)C207 (30 cavities)
(4)Inflatable Restraint I/P Module (AK5)
(5)Fuse Block - I/P - 1
(6)Fuse Block - I/P - 2
(7)Air Brake Pressure Gage Lamp (JE4), Differential Lock Switch Lamp (HNB/HPL/HPN), Inter-Axle Differential Lock Switch Lamp (Tandem Axle), Rear Axle Driver Control Switch Lamp - Two Speed (HR1/Automatic Transmission)
(8)HVAC Control Assembly (C40/C60)
(9)Turn Signal/Hazard Flasher Module
(10)Daytime Running Lights (DRL) Diode
(11)Instrument Panel Cluster (IPC)
(12)Headlamp Switch
(13)Daytime Running Lights (DRL) Module
(14)SP203 (12 cavities)
(15)C201 (48 cavities)
(16)Inflatable Restraint Steering Wheel Module (AJ3/AK5)
(17)C211 (22 cavities)
(18)C215 (8 cavities)
(19)C150 (4 cavities)
(20)Accelerator Pedal Position (APP) Sensor
(21)Radio
(22)Serial Data Gateway (SDG)
(23)Driver Information Center (DIC)
(24)Engine Control Module (ECM)
(25)C126 (40 cavities)
(26)C109 (40 cavities)
(27)C200
(28)C118
(29)G102
Figure 8:

Left Front Door
Object Number: 1014673 Size: LF
(1)Door Lock Switch - Driver (AU3)
(2)Outside Rearview Mirror Switch (DB6)
(3)Window Switch - Driver (A31)
(4)Outside Rearview Mirror Switch Connector
(5)Window Switch - Driver Connector
(6)Door Lock Switch - Driver Connector
(7)Speaker - LF Tweeter Connector
(8)Speaker - LF Tweeter (ZQ2)
(9)Speaker - LF
(10)Speaker - LF Connector
(11)Window Motor - Driver (A31)
(12)Door Latch Assembly - Driver C1 (Lock Actuator)
(13)Door Latch Assembly - Driver C2 (Jamb Switch)
Figure 9:

Cab - Front View (GRW)
Object Number: 953518 Size: LF
(1)Outside Rearview Mirror - Passenger
(2)Headlamp - High/Low Beam - Right
(3)Clearance Lamp - Right
(4)Identification (ID) Lamp - Right
(5)Identification (ID) Lamp - Center
(6)Identification (ID) Lamp - Left
(7)Clearance Lamp - Left
(8)Outside Rearview Mirror - Driver
(9)Park/Turn Signal Lamp - LF
(10)Headlamp - High/Low Beam - Left
(11)Park/Turn Signal Lamp - RF
Figure 10:

Manual Transmission
Object Number: 953494 Size: LF
(1)Rear Axle Driver Control Switch - Two Speed (HPZ/Manual Transmission) or Two Speed Rear Axle Control Valve (HR2/Manual Transmission)
(2)Backup Lamp Switch
(3)Vehicle Speed Sensor (VSS)
Figure 11:

Right Front Door
Object Number: 1014807 Size: LF
(1)Door Lock Switch - Passenger (AU3)
(2)Window Switch - Passenger (A31)
(3)Window Switch - Passenger Connector
(4)Door Lock Switch - Passenger Connector
(5)Speaker - RF Tweeter Connector
(6)Speaker - RF Tweeter (ZQ2)
(7)Door Latch Assembly - Passenger C1 (Lock Actuator)
(8)Door Latch Assembly - Passenger C2 (Jamb Switch)
(9)Window Motor - Passenger (A31)
(10)Speaker - RF Connector
(11)Speaker - RF