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

Fuse Block - Underhood Bussing


Object Number: 1899136  Size: FS
Master Electrical Component List
Control Module References
Ignition Mode Switch
Figure 2:

Ignition Mode Switch


Object Number: 1899139  Size: FS
Master Electrical Component List
Control Module References
COOLFAN, AMP, HVAC, ABS, W/S WASH/INTERCOOL, MRRTD, ECM/TCM, HORN, and BATT2 Fuses
Fuse Block - Underhood Bussing
BATT5, TILT/TELE SW/MEM SEAT MOD, ACCA/DRIV DR SW, IGN SW/INTR SENSR, ONSTAR, and PRK BRK SOLA Fuses
BATT5, TILT/TELE SW/MEM SEAT MOD, ACCA/DRIV DR SW, IGN SW/INTR SENSR, ONSTAR, and PRK BRK SOLA Fuses
Master Electrical Schematic Icons
Figure 3:

COOLFAN, AMP, HVAC, ABS, W/S WASH/INTERCOOL, MRRTD, ECM/TCM, HORN, and BATT2 Fuses


Object Number: 1899141  Size: FS
Master Electrical Component List
Control Module References
BATT1, HTD SEAT LH, HTD SEAT RH, PWR LUMBAR LH/RH Fuses, and DR CNTRLS, PWR SEAT Circuit Breakers
Ignition Mode Switch
Fuse Block - Underhood Bussing
Figure 4:

BATT1, HTD SEAT LH, HTD SEAT RH, PWR LUMBAR LH/RH Fuses, and DR CNTRLS, PWR SEAT Circuit Breakers


Object Number: 1899145  Size: FS
Master Electrical Component List
Control Module References
AUXILIARY POWER Relay, and CIGAR LTR, AUX PWR, FOLDING TOP/TRUNK LATCH, COLUMN LK MDL (EUROPE) Fuses
COOLFAN, AMP, HVAC, ABS, W/S WASH/INTERCOOL, MRRTD, ECM/TCM, HORN, and BATT2 Fuses
Fuse Block - Underhood Bussing
AUXILIARY POWER Relay, and CIGAR LTR, AUX PWR, FOLDING TOP/TRUNK LATCH, COLUMN LK MDL (EUROPE) Fuses
Figure 5:

AUXILIARY POWER Relay, and CIGAR LTR, AUX PWR, FOLDING TOP/TRUNK LATCH, COLUMN LK MDL (EUROPE) Fuses


Object Number: 1899152  Size: FS
Master Electrical Component List
Control Module References
BATT5, TILT/TELE SW/MEM SEAT MOD, ACCA/DRIV DR SW, IGN SW/INTR SENSR, ONSTAR, and PRK BRK SOLA Fuses
BATT1, HTD SEAT LH, HTD SEAT RH, PWR LUMBAR LH/RH Fuses, and DR CNTRLS, PWR SEAT Circuit Breakers
BATT1, HTD SEAT LH, HTD SEAT RH, PWR LUMBAR LH/RH Fuses, and DR CNTRLS, PWR SEAT Circuit Breakers
Figure 6:

BATT5, TILT/TELE SW/MEM SEAT MOD, ACCA/DRIV DR SW, IGN SW/INTR SENSR, ONSTAR, and PRK BRK SOLA Fuses


Object Number: 1899161  Size: FS
Master Electrical Component List
Control Module References
BATT3, STOP/B/U/LPS, BTSI SOL/COL LOCK, RADIO, S-BAND/VICS, PWR FLDG MIR - EXT RET, REAR FOG/ALDL, REVERESE LAMPS Fuses, and REVERSE LAMP Relay
AUXILIARY POWER Relay, and CIGAR LTR, AUX PWR, FOLDING TOP/TRUNK LATCH, COLUMN LK MDL (EUROPE) Fuses
Fuse Block - Underhood Bussing
Figure 7:

BATT3, STOP/B/U/LPS, BTSI SOL/COL LOCK, RADIO, S-BAND/VICS, PWR FLDG MIR - EXT RET, REAR FOG/ALDL, REVERSE LAMPS Fuses, and REVERSE LAMP Relay


Object Number: 1899170  Size: FS
Master Electrical Component List
Control Module References
CLSTR/HUD, DECK LID CLOSE/PARK/BRK B, DR LOCKS, INTERIOR LIGHTS, HVAC/PWR SND, ISRVM/HVAC, TUTD SW STRG COL SW Fuses, and RUN/CRANK Relay
BATT5, TILT/TELE SW/MEM SEAT MOD, ACCA/DRIV DR SW, IGN SW/INTR SENSR, ONSTAR, and PRK BRK SOLA Fuses
Fuse Block - Underhood Bussing
CLSTR/HUD, DECK LID CLOSE/PARK/BRK B, DR LOCKS, INTERIOR LIGHTS, HVAC/PWR SND, ISRVM/HVAC, TUTD SW STRG COL SW Fuses, and RUN/CRANK Relay
Figure 8:

CLSTR/HUD, DECK LID CLOSE/PARK/BRK B, DR LOCKS, INTERIOR LIGHTS, HVAC/PWR SND, ISRVM/HVAC, TUTD SW STRG COL SW Fuses, and RUN/CRANK Relay


Object Number: 1899189  Size: FS
Master Electrical Component List
Control Module References
RPA/H/C SEAT/WIPR RELAYS, GMLAN DEVICES, ECM, SCMPSIR SW, ACC/TCM, and ABS/MRRTD/AFS Fuses
BATT3, STOP/B/U/LPS, BTSI SOL/COL LOCK, RADIO, S-BAND/VICS, PWR FLDG MIR - EXT RET, REAR FOG/ALDL, REVERESE LAMPS Fuses, and REVERSE LAMP Relay
BATT3, STOP/B/U/LPS, BTSI SOL/COL LOCK, RADIO, S-BAND/VICS, PWR FLDG MIR - EXT RET, REAR FOG/ALDL, REVERESE LAMPS Fuses, and REVERSE LAMP Relay
RPA/H/C SEAT/WIPR RELAYS, GMLAN DEVICES, ECM, SCMPSIR SW, ACC/TCM, and ABS/MRRTD/AFS Fuses
Figure 9:

RPA/H/C SEAT/WIPR RELAYS, GMLAN DEVICES, ECM, SCMPSIR SW, ACC/TCM, and ABS/MRRTD/AFS Fuses


Object Number: 1899205  Size: FS
Master Electrical Component List
Control Module References
ETC, O2 SEN, EMISSION, ODD INJ, EVEN INJ Fuses, and IGN 1 Relay
CLSTR/HUD, DECK LID CLOSE/PARK/BRK B, DR LOCKS, INTERIOR LIGHTS, HVAC/PWR SND, ISRVM/HVAC, TUTD SW STRG COL SW Fuses, and RUN/CRANK Relay
CLSTR/HUD, DECK LID CLOSE/PARK/BRK B, DR LOCKS, INTERIOR LIGHTS, HVAC/PWR SND, ISRVM/HVAC, TUTD SW STRG COL SW Fuses, and RUN/CRANK Relay
Master Electrical Schematic Icons
Figure 10:

ETC, O2 SEN, EMISSION, ODD INJ, EVEN INJ Fuses, and IGN 1 Relay


Object Number: 1899222  Size: FS
Master Electrical Component List
Control Module References
LT HI BM, RT HI BM, LT LO BM, RT LO BM, WIPER, WIPR DWELL, RUN ACSRY PWR, STR WAL DIMMING Fuses, and HIGH BEAM, LOW BEAM, WIPER RUN/ACC, WIPER ON/OFF, WIPER HI/LO Relays
RPA/H/C SEAT/WIPR RELAYS, GMLAN DEVICES, ECM, SCMPSIR SW, ACC/TCM, and ABS/MRRTD/AFS Fuses
Fuse Block - Underhood Bussing
Figure 11:

LT HI BM, RT HI BM, LT LO BM, RT LO BM, WIPER, WIPR DWELL, RUN ACSRY PWR, STR WAL DIMMING Fuses, and HIGH BEAM, LOW BEAM, WIPER RUN/ACC, WIPER ON/OFF, AND WIPER HI/LO Relays


Object Number: 1899234  Size: FS
Master Electrical Component List
Control Module References
ETC, O2 SEN, EMISSION, ODD INJ, EVEN INJ Fuses, and IGN 1 Relay
Fuse Block - Underhood Bussing
Master Electrical Schematic Icons
Master Electrical Schematic Icons
Master Electrical Schematic Icons