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

Fuse Block - Underhood Bussing


Object Number: 1861445  Size: FS
Master Electrical Component List
Control Module References
Fuse Block - Underhood ABS, AMP, BATT2, COOLFAN, ECM/TCM/EASY KEY, HORN/ALT SENSE, HVAC, and MRRTD Fuses
Figure 2:

Fuse Block - Underhood-ABS, AMP, BATT2, COOL FAN, ECM/TCM EASY KEY, HORN/ALT SENSE, HVAC, and MRRTD Fuses


Object Number: 1861447  Size: FS
Master Electrical Component List
Control Module References
Fuse Block - Underhood BATT1 Fuse, Fuse Block - I/P, DRVR HTD SEAT, PASS HTD SEAT Fuses, PWR SEATS MSM and PRW/WNDWS TRUNK/FUEL RELSE Circuit Breakers
Fuse Block - Underhood Bussing
Fuse Block - Underhood Bussing
Figure 3:

Fuse Block - Underhood, BATT1 Fuse, Fuse Block-I/P, DRVR HTD SEAT and PASS HTD SEAT Fuses, PWR SEATS MSM and PRW/WNDWS TRUNK/FUEL RELSE Circuit Breakers


Object Number: 1861449  Size: FS
Master Electrical Component List
Control Module References
Fuse Block - I/P AUX PWR, LTR, and TRUNK RELSE Fuses
Fuse Block - Underhood ABS, AMP, BATT2, COOLFAN, ECM/TCM/EASY KEY, HORN/ALT SENSE, HVAC, and MRRTD Fuses
Fuse Block - Underhood Bussing
Fuse Block - I/P AUX PWR, LTR, and TRUNK RELSE Fuses
Figure 4:

Fuse Block - I/P AUX PWR, LTR, and TRUNK RELSE Fuses


Object Number: 1861450  Size: FS
Master Electrical Component List
Control Module References
Fuse Block - Underhood Fuse BATT5 BCM Fuses: DRIV DR SW, IGN SW/INTR SENS, ONSTAR, TELE SW/MEM SEAT MOD, and TPA
Fuse Block - Underhood BATT1 Fuse, Fuse Block - I/P, DRVR HTD SEAT, PASS HTD SEAT Fuses, PWR SEATS MSM and PRW/WNDWS TRUNK/FUEL RELSE Circuit Breakers
Fuse Block - Underhood BATT1 Fuse, Fuse Block - I/P, DRVR HTD SEAT, PASS HTD SEAT Fuses, PWR SEATS MSM and PRW/WNDWS TRUNK/FUEL RELSE Circuit Breakers
Figure 5:

Fuse Block - Underhood BATT 5 Fuse, BCM Fuses: DRIV DR SWTCH, IGN SWTCH/ INTR SNSR, ONSTAR, TELE SWTCH/MSM, and TPA


Object Number: 1861451  Size: FS
Master Electrical Component List
Control Module References
Fuse Block - Underhood BATT3 and STOP/B/U/LAMPS Fuses, BCM Fuses: BTSI SOL/STR WHL LCK, RDO/S-BAND/VICS, REAR FOG/ALDL/TOP SWTCH, REVERSE LAMPS and TONNEAU RELSE, BCK/UP LAMP, STOP LAMP Relays
Fuse Block - I/P AUX PWR, LTR, and TRUNK RELSE Fuses
Fuse Block - Underhood Bussing
Figure 6:

Fuse Block - Underhood BATT3 and STOP/B/U/LAMPS Fuses, BCM Fuses: BTSI SOL/STR WHL LCK, RDO/S-BAND/VICS, REAR FOG/ALDL/TOP SWTCH, REVERSE LAMPS, and TONNEAU RELSE and BCK/UP LAMP and STOP LAMP Relays


Object Number: 1861452  Size: FS
Master Electrical Component List
Control Module References
BCM Fuses: CLSTR/HUD, CRUISE SWTCH, CTSY/LAMP, DR LCK, EXH MDL, HVAC/PWR SND, ISRVM/HVAC and RUN CRNK Relay
Fuse Block - Underhood Fuse BATT5 BCM Fuses: DRIV DR SW, IGN SW/INTR SENS, ONSTAR, TELE SW/MEM SEAT MOD, and TPA
Fuse Block - Underhood Bussing
BCM Fuses: CLSTR/HUD, CRUISE SWTCH, CTSY/LAMP, DR LCK, EXH MDL, HVAC/PWR SND, ISRVM/HVAC and RUN CRNK Relay
Figure 7:

BCM Fuses: CLSTR/HUD, CRUISE SWTCH, CTSY/LAMP, DR LCK, EXH MDL, HVAC/PWR SND, ISRVM/HVAC and RUN CRNK Relay


Object Number: 1861453  Size: FS
Master Electrical Component List
Control Module References
BCM Fuses: ECM, HTD SEAT/WPR Relays, GM LAN RUN/CRNK, and SDM/AOS AIRBAG, Fuse Block - Underhood ABS/MRRTD and TCM/TRANS Fuses and WIPER RUN/ACC Relay
Fuse Block - Underhood BATT3 and STOP/B/U/LAMPS Fuses, BCM Fuses: BTSI SOL/STR WHL LCK, RDO/S-BAND/VICS, REAR FOG/ALDL/TOP SWTCH, REVERSE LAMPS and TONNEAU RELSE, BCK/UP LAMP, STOP LAMP Relays
Fuse Block - Underhood BATT3 and STOP/B/U/LAMPS Fuses, BCM Fuses: BTSI SOL/STR WHL LCK, RDO/S-BAND/VICS, REAR FOG/ALDL/TOP SWTCH, REVERSE LAMPS and TONNEAU RELSE, BCK/UP LAMP, STOP LAMP Relays
BCM Fuses: ECM, HTD SEAT/WPR Relays, GM LAN RUN/CRNK, and SDM/AOS AIRBAG, Fuse Block - Underhood ABS/MRRTD and TCM/TRANS Fuses and WIPER RUN/ACC Relay
Figure 8:

BCM Fuses: ECM, HTD SEAT/WPR RELAYS, GM LAN RUN/CRNK, and SDM/AOS AIRBAG, Fuse Block - Underhood ABS/MRRTD and TCM/TRANS Fuses and WIPER RUN/ACC Relay


Object Number: 1861458  Size: FS
Master Electrical Component List
Control Module References
Fuse Block - Underhood A/C COMP, EMISSION, EVEN INJ, MAN TRAN SOL, O2 SEN, ODD INJ, and PT INPUT/ETC Fuses, A/C COMP and POWERTRAIN IGN1, Relays
BCM Fuses: CLSTR/HUD, CRUISE SWTCH, CTSY/LAMP, DR LCK, EXH MDL, HVAC/PWR SND, ISRVM/HVAC and RUN CRNK Relay
BCM Fuses: CLSTR/HUD, CRUISE SWTCH, CTSY/LAMP, DR LCK, EXH MDL, HVAC/PWR SND, ISRVM/HVAC and RUN CRNK Relay
Figure 9:

Fuse Block - Underhood A/C COMP, EMISSION, EVEN INJ, MAN TRAN SOL, 02 SEN, ODD INJ, and PT INPUT/ETC Fuses, A/C COMP and POWERTRAIN IGN1 Relays


Object Number: 1861464  Size: FS
Master Electrical Component List
Control Module References
Fuse Block - Underhood LT HI BM, LT LO BM, RT HI BM, RT LO BM, WIPER and W/S WAS Fuses, HIGH BEAM, LOW BEAM, WIPER HI/LO, WIPER ON/OFF, WIPER RUN/ACC and W/S WASH Relays, Fuse Block-I/P WPR DWELL and
BCM Fuses: ECM, HTD SEAT/WPR Relays, GM LAN RUN/CRNK, and SDM/AOS AIRBAG, Fuse Block - Underhood ABS/MRRTD and TCM/TRANS Fuses and WIPER RUN/ACC Relay
Fuse Block - Underhood Bussing
Figure 10:

Fuse Block - Underhood LT HI BM, LT LO BM, RT HI BM, RT LO BM, WIPER, and W/S WASH Fuses, HIGH BEAM, LOW BEAM, WIPER HI/LO, WIPER ON/OFF, WIPER RUN/ACC and W/S WASH Relays, Fuse Block - I/P WPR DWELL and WPR/WSW Fuses


Object Number: 1861466  Size: FS
Master Electrical Component List
Control Module References
Ignition Modes
Fuse Block - Underhood A/C COMP, EMISSION, EVEN INJ, MAN TRAN SOL, O2 SEN, ODD INJ, and PT INPUT/ETC Fuses, A/C COMP and POWERTRAIN IGN1, Relays
Fuse Block - Underhood Bussing
Power and Grounding Schematic Icons
Power and Grounding Schematic Icons
Figure 11:

Ignition Modes


Object Number: 1861471  Size: FS
Master Electrical Component List
Control Module References
Fuse Block - Underhood LT HI BM, LT LO BM, RT HI BM, RT LO BM, WIPER and W/S WAS Fuses, HIGH BEAM, LOW BEAM, WIPER HI/LO, WIPER ON/OFF, WIPER RUN/ACC and W/S WASH Relays, Fuse Block-I/P WPR DWELL and
Fuse Block - Underhood Fuse BATT5 BCM Fuses: DRIV DR SW, IGN SW/INTR SENS, ONSTAR, TELE SW/MEM SEAT MOD, and TPA
Fuse Block - Underhood Fuse BATT5 BCM Fuses: DRIV DR SW, IGN SW/INTR SENS, ONSTAR, TELE SW/MEM SEAT MOD, and TPA
Power and Grounding Schematic Icons
Power and Grounding Schematic Icons
Ground, Power and Wiper Motor