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

Fuse Block - Underhood Bussing


Object Number: 2079904  Size: FS
Master Electrical Component List
Control Module References
SEO 9C1/9C3
SEO 9C1/9C3
Figure 2:

SEO 9C1/9C3


Object Number: 2079919  Size: FS
Master Electrical Component List
Control Module References
Ignition Switch
Fuse Block - Underhood Bussing
Fuse Block - Underhood Bussing
Figure 3:

Ignition Switch


Object Number: 2079924  Size: FS
Master Electrical Component List
Control Module References
BATT 1, CNSTR, XM, TRUNK, AMP, AUX Fuses, and TRUNK Relay
SEO 9C1/9C3
Fuse Block - Underhood Bussing
Figure 4:

BATT 1, CNSTR, XM, TRUNK, AMP, AUX Fuses, and TRUNK Relay


Object Number: 2079927  Size: FS
Master Electrical Component List
Control Module References
BATT 2, HTD/SEAT, AIRBAG, PWR/MIR Fuses, and PWR/SEAT Circuit Breaker
Ignition Switch
Fuse Block - Underhood Bussing
Figure 5:

BATT 2, HTD/SEAT, AIRBAG, PWR/MIR Fuses, and PWR/SEAT Circuit Breaker


Object Number: 2079937  Size: FS
Master Electrical Component List
Control Module References
S/ROOF, DR/LCK, RAP Fuses, and RAP Relay, DOOR UNLOCk PCB Relay - Driver, DOOR UNLOCK PCB Relay, and DOOR LOCK PCB Relay
BATT 1, CNSTR, XM, TRUNK, AMP, AUX Fuses, and TRUNK Relay
Fuse Block - Underhood Bussing
S/ROOF, DR/LCK, RAP Fuses, and RAP Relay, DOOR UNLOCk PCB Relay - Driver, DOOR UNLOCK PCB Relay, and DOOR LOCK PCB Relay
Master Electrical Schematic Icons
Master Electrical Schematic Icons
Figure 6:

S/ROOF, DR/LCK, RAP Fuses, and RAP Relay, DOOR UNLOCK PCB Relay - Driver, DOOR UNLOCK PCB Relay, and DOOR LOCK PCB Relay


Object Number: 2079944  Size: FS
Master Electrical Component List
Control Module References
BATT 4, ABS MTR1, ABS MTR2, AIR PUMP, AIR SOL, AUX PWR, Radio Fuses, and PWR/WNDW Circuit Breaker
BATT 2, HTD/SEAT, AIRBAG, PWR/MIR Fuses, and PWR/SEAT Circuit Breaker
BATT 2, HTD/SEAT, AIRBAG, PWR/MIR Fuses, and PWR/SEAT Circuit Breaker
BATT 4, ABS MTR1, ABS MTR2, AIR PUMP, AIR SOL, AUX PWR, Radio Fuses, and PWR/WNDW Circuit Breaker
Figure 7:

BATT 4, ABS MTR1, ABS MTR2, AIR PUMP, AIR SOL, AUX PWR, RADIO Fuses, and PWR/WNDW Circuit Breaker


Object Number: 2079953  Size: FS
Master Electrical Component List
Control Module References
ONSTAR, INT LTS/PNL DIM, LT T/SIG, RT T/SIG, CHMSL/BCK-UP, INT LIGHTS, RVC SEN, and ECM/TCM Fuses
S/ROOF, DR/LCK, RAP Fuses, and RAP Relay, DOOR UNLOCk PCB Relay - Driver, DOOR UNLOCK PCB Relay, and DOOR LOCK PCB Relay
S/ROOF, DR/LCK, RAP Fuses, and RAP Relay, DOOR UNLOCk PCB Relay - Driver, DOOR UNLOCK PCB Relay, and DOOR LOCK PCB Relay
Moveable Window Schematics
Fuse Block - Underhood Bussing
Figure 8:

ONSTAR, INT LTS/PNL DIM, LT T/SIG, RT T/SIG, CHMSL/BCK-UP, INT LIGHTS, RVC SEN, and ECM/TCM Fuses


Object Number: 2079961  Size: FS
Master Electrical Component List
Control Module References
HDLP MDL, DISPLAY, LT SPOT, and RT SPOT Fuses
BATT 4, ABS MTR1, ABS MTR2, AIR PUMP, AIR SOL, AUX PWR, Radio Fuses, and PWR/WNDW Circuit Breaker
Fuse Block - Underhood Bussing
Figure 9:

HDLP MDL, DISPLAY, LT SPOT, and RT SPOT Fuses


Object Number: 2079971  Size: FS
Master Electrical Component List
Control Module References
ECM IGN, TRANS, PWR DROP/CRNK, AIRBAG/DISPLAY, STRTR, FUEL/PUMP, and HORN Fuses
ONSTAR, INT LTS/PNL DIM, LT T/SIG, RT T/SIG, CHMSL/BCK-UP, INT LIGHTS, RVC SEN, and ECM/TCM Fuses
Fuse Block - Underhood Bussing
Figure 10:

ECM IGN, TRANS, PWR DROP/CRNK, AIRBAG/DISPLAY, STRTR, FUEL/PUMP, and HORN Fuses


Object Number: 2079977  Size: FS
Master Electrical Component List
Control Module References
ETC/ECM, INJ 1, INJ 2 fuses (LZE, LZ4, LZG)
HDLP MDL, DISPLAY, LT SPOT, and RT SPOT Fuses
Fuse Block - Underhood Bussing
Master Electrical Schematic Icons
Master Electrical Schematic Icons
Figure 11:

ETC/ECM, INJ 1, and INJ 2 Fuses (LZE, LZ4, LGD)


Object Number: 2079987  Size: FS
Master Electrical Component List
Control Module References
ETC/ECM, INJ 1, INJ 2 Fuses (LS4)
ECM IGN, TRANS, PWR DROP/CRNK, AIRBAG/DISPLAY, STRTR, FUEL/PUMP, and HORN Fuses
Fuse Block - Underhood Bussing
Figure 12:

ETC/ECM, INJ 1, and INJ 2 Fuses (LS4)


Object Number: 2079994  Size: FS
Master Electrical Component List
Control Module References
EMISSIONS 1, EMISSIONS 2, A/C CMPRSR Fuses, and A/C CMPRSR, FAN 1, FAN 2, and FAN 3 Relays
ETC/ECM, INJ 1, INJ 2 fuses (LZE, LZ4, LZG)
Fuse Block - Underhood Bussing
Figure 13:

EMISSIONS 1, EMISSIONS 2, A/C CMPRSR Fuses, A/C CMPRSR, FAN 1, FAN 2, and FAN 3 Relays


Object Number: 2079998  Size: FS
Master Electrical Component List
Control Module References
BATT 3, HTD MIR, FOG LAMPS, WSW, LT PARK, and RT PARK Fuses
ETC/ECM, INJ 1, INJ 2 Fuses (LS4)
Fuse Block - Underhood Bussing
Fuse Block - Underhood Bussing
Figure 14:

BATT 3, HTD MIR, FOG LAMPS, WSW, LT PARK, and RT PARK Fuses


Object Number: 2080006  Size: FS
Master Electrical Component List
Control Module References
DRL 1, DRL 2, LT LO BEAM, RT LO BEAM, LT HI BEAM, RT HI BEAM, and STRG WHL Fuses
EMISSIONS 1, EMISSIONS 2, A/C CMPRSR Fuses, and A/C CMPRSR, FAN 1, FAN 2, and FAN 3 Relays
Fuse Block - Underhood Bussing
Figure 15:

DRL 1, DRL 2, LT LO BEAM, RT LO BEAM, LT HI BEAM, RT HI BEAM, and STRG WHL Fuses


Object Number: 2080011  Size: FS
Master Electrical Component List
Control Module References
BATT 3, HTD MIR, FOG LAMPS, WSW, LT PARK, and RT PARK Fuses
Fuse Block - Underhood Bussing
Radio, HVAC Control Module, Driver Information Center (DIC) Switch, and Steering Wheel Controls
Radio, HVAC Control Module, Driver Information Center (DIC) Switch, and Steering Wheel Controls
Master Electrical Schematic Icons