GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Engine 🢒 Engine Controls - 6.6L (LB7) 🢒 Driver Information System Schematics
Figure 1:

Driver Information Center (DIC)
Object Number: 1464518 Size: FS
Master Electrical Component List
Indicator/Warning Message Description and Operation
Gage Cluster
Ignition Switch - OFF/RUN/START, RUN/START and START Bus Bars
GAUGES, L-RR TRUCK, R-RR TRUCK, and SIR Fuses/Circuit Breakers
Engine Exhaust System
Starter and Charging System (LG4/LG5)
odule Power, Grounds, Serial Data, and MIL
Transmission Tell-Tale Module
Module Power, Ground, Serial Data, MIL, VSS, and Torque
EBC, Air Brake Relay, Telltale Module ABS
Differential Lock Switch
Brake Booster Pump
Windshield Wiper/Washer System
Engine Exhaust System
G100 (L18)
G200, G202, and G203 - 1 of 4
G118, G119, and G120
Figure 2:

Gage Cluster
Object Number: 1351820 Size: FS
Master Electrical Component List
Indicator/Warning Message Description and Operation
Driver Information Center (DIC)
Ignition Switch - OFF/RUN/START, RUN/START and START Bus Bars
Interior Dimming Lamps System
GAUGES, L-RR TRUCK, R-RR TRUCK, and SIR Fuses/Circuit Breakers
G103 - 1 of 2, G105, and G106
G103 - 1 of 2, G105, and G106
G200, G202, and G203 - 1 of 4