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

Underhood Fuse Block, B+ Bussing


Object Number: 1785075  Size: FS
Master Electrical Component List
Control Module References
BCM Fuses - DR LCK, ECM/TCM, INT LIGHT, PWR WNDW, RDO, SDM, S ROOF
BCM Fuses - DR LCK, ECM/TCM, INT LIGHT, PWR WNDW, RDO, SDM, S ROOF
Figure 2:

RAP, DOOR LOCK, DOOR UNLOCK, INTERIOR LAMPS Relays, DOOR LOCK RADIO, PWR WINDOW, SUNROOF, INT LPS, ECM/TCM, SDM, CURRENT SENSOR Fuses


Object Number: 1785139  Size: FS
Master Electrical Component List
Control Module References
Underhood Fuse Block Fuses- ABS, ABS2, BCK UP, CNSTR VENT, ECM/TRANS, EPS, HTD SEATS, IP IGN, LTR, MIR, PRK/NEUT, S-BAND/ONSTAR, and RUN/CRANK Relay
B+ Bussing, Underhood Fuse Block B+ Bus
B+ Bussing, Underhood Fuse Block B+ Bus
Power and Grounding Schematic Icons
Figure 3:

RUN/CRANK Relay, I/P IGN, BACKUP, ABS, ECM, TRANS, LIGHTING, S-BAND, MIRROR, ABS, EPS, BCM2, BCM3, HEATED SEATS Fuses


Object Number: 1785087  Size: FS
Master Electrical Component List
Control Module References
Body Control Module - AUDIO AMPLIFIER Fuse, BCM2 Fuse, CLUSTER Fuse, IGN SW Fuse, STOP LPS Fuse
BCM Fuses - DR LCK, ECM/TCM, INT LIGHT, PWR WNDW, RDO, SDM, S ROOF
B+ Bussing, Underhood Fuse Block B+ Bus
Body Control Module - AUDIO AMPLIFIER Fuse, BCM2 Fuse, CLUSTER Fuse, IGN SW Fuse, STOP LPS Fuse
Figure 4:

BCM2, CLUSTER, IGN SW, STOP LPS, AUDIO AMPLIFIER Fuses


Object Number: 1785140  Size: FS
Master Electrical Component List
Control Module References
Underhood Fuse Block Fuses- EMISN, FUEL PMP, INJ, PCM/ECM, and FUEL PMP Relay and PWR/TRN Relay
Underhood Fuse Block Fuses- ABS, ABS2, BCK UP, CNSTR VENT, ECM/TRANS, EPS, HTD SEATS, IP IGN, LTR, MIR, PRK/NEUT, S-BAND/ONSTAR, and RUN/CRANK Relay
Underhood Fuse Block Fuses- ABS, ABS2, BCK UP, CNSTR VENT, ECM/TRANS, EPS, HTD SEATS, IP IGN, LTR, MIR, PRK/NEUT, S-BAND/ONSTAR, and RUN/CRANK Relay
Figure 5:

FUEL PUMP, POWERTRAIN Relay, FUEL PUMP, EMISSION, INJECTOR Fuses


Object Number: 1785098  Size: FS
Master Electrical Component List
Control Module References
Underhood Fuse Block Fuses- AFTERCOOL, AIR PMP, AIR SOL, FOG LP, HORN, TRUNK/OUTLET
Body Control Module - AUDIO AMPLIFIER Fuse, BCM2 Fuse, CLUSTER Fuse, IGN SW Fuse, STOP LPS Fuse
B+ Bussing, Underhood Fuse Block B+ Bus
Underhood Fuse Block Fuses- AFTERCOOL, AIR PMP, AIR SOL, FOG LP, HORN, TRUNK/OUTLET
Figure 6:

AIR SOLENOID, A/C CLUTCH, HORN, FOG LAMP Relays, AIR SOLENOID, A/C, HORN, FOG LAMP Fuses


Object Number: 1785130  Size: FS
Master Electrical Component List
Control Module References
Underhood Fuse Block Fuses- LH HI BEAM, LH LO BEAM, PRK LPS, RH HI BEAM, RH LO BEAM
Underhood Fuse Block Fuses- EMISN, FUEL PMP, INJ, PCM/ECM, and FUEL PMP Relay and PWR/TRN Relay
B+ Bussing, Underhood Fuse Block B+ Bus
Underhood Fuse Block Fuses- EMISN, FUEL PMP, INJ, PCM/ECM, and FUEL PMP Relay and PWR/TRN Relay
Figure 7:

PARK LPS, LOW BEAM, HIGH BEAM Relays, PARK LPS, RF LOW BEAM, LF LOW BEAM, RF HIGH BEAM, LF HIGH BEAM Fuses


Object Number: 1785138  Size: FS
Master Electrical Component List
Control Module References
Underhood Fuse Block IP IGN Fuse, Body Control Module Fuses - AIRBAG, EPS/STR WHL CNTRL, HVAC/IP IGN, WPR
Underhood Fuse Block Fuses- AFTERCOOL, AIR PMP, AIR SOL, FOG LP, HORN, TRUNK/OUTLET
B+ Bussing, Underhood Fuse Block B+ Bus
Figure 8:

RUN/CRANK, HVAC Relays, I/P, IGN, BCM3, WIPER, I/P IGN Fuses


Object Number: 1785141  Size: FS
Master Electrical Component List
Control Module References
Underhood Fuse Block Fuses- LH HI BEAM, LH LO BEAM, PRK LPS, RH HI BEAM, RH LO BEAM
Power and Grounding Schematic Icons
B+ Bussing, Underhood Fuse Block B+ Bus
Power and Grounding Schematic Icons
Power and Grounding Schematic Icons