GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Power and Ground


Object Number: 776807  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Indicators
BRAKE, Cruise, HTR A/C, RR WPR, WS WPR, and SEO ACCY Fuses
IGN 1, TURN, SEO IGN, AIR BAG, CRANK, and IGN 0 Fuses
AIR, RTD, RADIO, RDO AMP, ECM B, FRT HVAC, and CIGAR Fuses
BRAKE, Cruise, HTR A/C, RR WPR, WS WPR, and SEO ACCY Fuses
IGN 1, TURN, SEO IGN, AIR BAG, CRANK, and IGN 0 Fuses
AUX PWR and HORN Fuses
AIR, RTD, RADIO, RDO AMP, ECM B, FRT HVAC, and CIGAR Fuses
Wiper/Washer System Schematics
G103 and G105 - Gas
G105 - Diesel
Figure 2:

Indicators


Object Number: 776808  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Gages
Power and Ground
IPC, Roof Beacon, and Rear Wheel Steering Switch
G203 - 1 of 3
G203 - 1 of 3
Park/Turn Signal Lamps
G203 - 2 of 3 - Base Except Crew Cab
G203 - 2 of 3 - Base Except Crew Cab
Figure 3:

Gages and Vehicle Speed


Object Number: 776809  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Fuel Gage and Fuel Pump and Sender Assembly
Indicators
Splice Pack SP205
G102, G103, and G104 - Diesel
G103 and G105 - Gas
Figure 4:

Fuel Gage and Fuel Pump and Sender Assembly


Object Number: 776810  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Gages
Splice Pack SP205