GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
GMC_Truck
🢒
2003
🢒
TopKick C-Series Commercial (Cutaway) C4/C5
🢒 Module Power, Ground, Serial Data, and MIL
Module Power, Ground, Serial Data, and MIL
Module Power, Ground, Serial Data, and MIL
Master Electrical Component List
Engine Control Module Description
Fuse Block - Underhood Ignition A and B Relays
Engine Controls Schematic Icons
Underhood Fuse Block, ENG 3 and ENG 2 Fuses (LG5/LB7)
Underhood Fuse Block, PCM-B, HTD FUEL, A/C COMP, and RR DEFOG Fuses
Ignition Switch, OFF/RUN/START, RUN/START, and START Bus Bars
Ignition Switch, OFF/RUN/START, RUN/START, and START Bus Bars
Underhood Fuse Block, PCM-B, HTD FUEL, A/C COMP, and RR DEFOG Fuses
I/P Fuse Block, START and TRANS Fuses/Circuit Breakers
Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker
I/P Fuse Block, R-RR TRUCK, L-RR TRUCK, GAGES, and SIR Fuses/Circuit Breaker
Instrument Panel Cluster - 1 of 2
I/P Fuse Block, START and TRANS Fuses/Circuit Breakers
Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker
J1939 Serial Data (LB7)
Splice Pack SP203 (L18/LB7/LG4)
G200, G202, and G203 - 1 of 4
