GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 TopKick C-Series (Conventional) C4/C5 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Instrument Panel, Gages, and Console Component Views
Figure 1:

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 2:

Center of Vehicle
Object Number: 822020 Size: LF
(1)Fuel Pump and Sender Assembly
(2)Primary Fuel Tank
(3)C420
(4)Fuel Sender - Secondary
Figure 3:

Chime Module
Object Number: 1430187 Size: LF
(1)Chime Module
Figure 4:

Fuel Senders, G400, Low Air Alarms, Splice Pack SP400 (Ground Block) - LG4/LG5


Object Number: 953488 Size: LF
(1)Fuel Sender - Primary
(2)Fuel Tank
(3)Low Air Pressure Switch - Primary
(4)Low Air Pressure Switch - Secondary
(5)Splice Pack SP400 (Ground Block - 6 cavities)
(6)Fuel Sender - Secondary Connector
(7)Ground G400
(8)Fuel Sender - Secondary
(9)Fuel Tank - Secondary
Figure 5:

Front Left of the I/P
Object Number: 1457104 Size: LF
(1)Instrument Panel Cluster (IPC)
(2)Radio
(3)HVAC Control Assembly
(4)Overdrive Defeat Switch (Allison® LCT)
(5)Headlamp Switch
Figure 6:

Lower Back of Engine
Object Number: 1702248 Size: LF
(1)Knock Sensor (KS) Bank 2
(2)Engine Oil Level Switch
(3)Starter Solenoid
(4)Engine Chassis Harness