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

Underhood Fuse Block - B+ Bus


Object Number: 1887757  Size: FS
Master Electrical Component List
Control Module References
Underhood Fuse Block - RUN/CRANK Relay, I/P IGN, PRK/NEUT, HTD/SEAT/BKC/UP, ABS (10A), ECM TRANS, ABS (30A), EPS, BCM2, BCM3, FRT AUX PWR OUTLET, S-BAND Fuses
Figure 2:

Underhood Fuse Block - RUN/CRANK Relay, I/P IGN, PRK/NEUT, HTD/SEAT/BCK/UP, ABS (10A), ECM TRANS, FRT AUX PWR OUTLET, ABS (30A), EPS, BCM 2, BCM3, S-BAND Fuses


Object Number: 1887759  Size: FS
Master Electrical Component List
Control Module References
Underhood Fuse Block - L/GATE RELEASE, PWR/TRN Relays, L/GATE/S ROOF, EXH, INJ IGN MOD and ECM Fuses
Underhood Fuse Block - B+ Bus
Figure 3:

Underhood Fuse Block - L/GATE RELEASE, PWR/TRN Relays, L/GATE/S ROOF, EXH, INJ IGN MOD and ECM Fuses


Object Number: 1887762  Size: FS
Master Electrical Component List
Control Module References
Underhood Fuse Block - LOW BEAM, HIGH BEAM, DRL Relays, HTD SEAT, DRL, RT LO BEAM, LT LO BEAM, LT HI BEAM, RT HI BEAM Fuses
Underhood Fuse Block - RUN/CRANK Relay, I/P IGN, PRK/NEUT, HTD/SEAT/BKC/UP, ABS (10A), ECM TRANS, ABS (30A), EPS, BCM2, BCM3, FRT AUX PWR OUTLET, S-BAND Fuses
Figure 4:

Underhood Fuse Block - LOW BEAM, HIGH BEAM, DRL Relays, HTD SEAT, DRL, RT LO BEAM, LT LO BEAM, LT HI BEAM, RT HIGH BEAM Fuses


Object Number: 1887764  Size: FS
Master Electrical Component List
Control Module References
Underhood Fuse Block - ABS (20A), CNSTR VENT, PWR OUTLET, REAR POWER PLUG, REAR AUX PWR OUTLET and MIR Fuses, PWR SEATS Circuit Breaker
Underhood Fuse Block - L/GATE RELEASE, PWR/TRN Relays, L/GATE/S ROOF, EXH, INJ IGN MOD and ECM Fuses
Figure 5:

Underhood Fuse Block - ABS (20A), CNSTR VENT, PWR OUTLET, REAR POWER PLUG, REAR AUX PWR OUTLET and MIR Fuses and POWER SEATS Circuit Breaker


Object Number: 1887766  Size: FS
Master Electrical Component List
Control Module References
RAP, DRIVER DOOR UNLOCK PCB, DOOR UNLOCK PCB, DOOR LOCK PCB and INTERIOR LAMPS PCB Relays, RDO, PWR WINDW, DR LCK, INT LIGHT, ECM/TCM, SDM, S ROOF AND SPARE Fuse
Underhood Fuse Block - LOW BEAM, HIGH BEAM, DRL Relays, HTD SEAT, DRL, RT LO BEAM, LT LO BEAM, LT HI BEAM, RT HI BEAM Fuses
Figure 6:

Body Control Module - RAP, DRIVER DOOR UNLOCK PCB, DOOR UNLOCK PCB, DOOR LOCK PCB, and INTERIOR LAMPS PCB Relays, RDO, PWR WINDW, DR LCK, INT LIGHT, ECM/TCM, SDM, S ROOF and SPARE Fuses


Object Number: 1887768  Size: FS
Master Electrical Component List
Control Module References
Body Control Module - BCM2, HVAC/PK3, CLUSTER, IGN SW, STOP LPS and AMP Fuses
Underhood Fuse Block - ABS (20A), CNSTR VENT, PWR OUTLET, REAR POWER PLUG, REAR AUX PWR OUTLET and MIR Fuses, PWR SEATS Circuit Breaker
Figure 7:

Body Control Module - BCM2, HVAC/PK3, CLUSTER, IGN SW, STOP LPS, and AMP Fuses


Object Number: 1887770  Size: FS
Master Electrical Component List
Control Module References
Body Control Module - RUN/CRANK and HVAC Relays, I/P IGN, BCM3, WPR, AIR BAG, EPS/STR WHL CNTRL and HVAC/IP IGNITION Fuses
RAP, DRIVER DOOR UNLOCK PCB, DOOR UNLOCK PCB, DOOR LOCK PCB and INTERIOR LAMPS PCB Relays, RDO, PWR WINDW, DR LCK, INT LIGHT, ECM/TCM, SDM, S ROOF AND SPARE Fuse
Figure 8:

Body Control Module - RUN/CRANK and HVAC Relays, I/P IGN, BCM3, WPR, AIR BAG, EPS/STR WHL CNTRL and HVAC/IP IGNITION Fuses


Object Number: 1887772  Size: FS
Master Electrical Component List
Control Module References
Body Control Module - BCM2, HVAC/PK3, CLUSTER, IGN SW, STOP LPS and AMP Fuses