GM Service Manual Online
For 1990-2009 cars only

Module Power, Ground, Serial Data and MIL

Module Power, Ground, Serial Data, and MIL


Object Number: 1492843  Size: FS
Master Electrical Component List
Engine Control Module Description
Fuseblocks - Underhood Ignition A and B Relays
Engine Controls Schematic Icons
Fuseblocks - Underhood Ignition A and B Relays
B+ Bus
Ignition Switch - OFF/RUN/START, RUN/START and START Busses
Ignition Switch - OFF/RUN/START, RUN/START and START Busses
A/C COMP, HTD FUEL, PCM-B, and RR DEFOG Fuses
START and TRANS Fuses/Circuit Breaker
ENGINE and PCM-1 Fuses/Circuit Breakers
GAGES, L-RR TRUCK, R-RR TRUCK, and SIR Fuses/Circuit Breakers
Instrument Panel Cluster - 1 of 2
START and TRANS Fuses/Circuit Breaker
ENGINE and PCM-1 Fuses/Circuit Breakers
J1939 Serial Data - LLY
Splice Pack SP203
G203 - 2 of 4