GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Monte Carlo 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Power and Grounding Component Views
Figure 1:

Forward Lamp Harness
Object Number: 885131 Size: LF
(1)C106
(2)Cooling Fan-Right Connector
(3)G101
(4)Headlamp Assembly-Left Connector
(5)Ambient Air Temperature Sensor Connector (w/U68)
(6)Fog Lamp-LF Connector
(7)Cooling Fan-Left Connector
(8)Horn Assembly Connector
(9)Fog Lamp-RF Connector
(10)Headlamp Assembly-Right Connector
Figure 2:

Right Front of Engine Compartment
Object Number: 742092 Size: LF
(1)Positive Battery Cable
(2)Negative Battery Cable
(3)Junction Block-Underhood (Top and Bottom)
(4)G100
(5)Battery
Figure 3:

Right Side of Engine Compartment
Object Number: 514086 Size: LF
(1)P100
(2)Fusible Links (Underhood Junction Block)
Figure 4:

Right Front of Engine Compartment (w/6J3)
Object Number: 592715 Size: LF
(1)C122
Figure 5:

Right Front of Vehicle (w/6J3)
Object Number: 592714 Size: LF
(1) Wiring Blunt End
Figure 6:

Underhood Junction Block
Object Number: 487972 Size: LF
(1)C112
(2)Junction Block--Underhood (Top and Bottom)
Figure 7:

Left Center of Engine Compartment
Object Number: 732595 Size: LF
(1)C101
(2)G151
(3)A/C Refrigerant Pressure Sensor
(4)C113
(5)Electronic Brake Control Module (EBCM)
(6)Cruise Control Module (CCM)
Figure 8:

Left Center Rear of Engine Compartment
Object Number: 834273 Size: MF
(1)Brake Master Cylinder
(2)Cruise Control Module
(3)Left Front Strut Tower
(4)C101
(5)G171
Figure 9:

Right Side of Engine (L36/L67)
Object Number: 305310 Size: LF
(1)Ignition Coils
(2)Ignition Control Module (ICM)
(3)G111
(4)Ignition Control Module (ICM) Wiring Harness
Figure 10:

Lower Front of Engine
Object Number: 487943 Size: LF
(1)Fusible Links (Starter)
(2)Positive Battery Feed
(3)G113 (Negative Battery Cable)
(4)G113 (Engine Wiring Harness)
(5)Starter Solenoid Lead
Figure 11:

Lower Left Front of Engine
Object Number: 764972 Size: LF
(1)G113
(2)G113 (L36)
(3)G117
Figure 12:

Left Side of Instrument Panel
Object Number: 741678 Size: LF
(1)Instrument Panel
(2)Junction Block-Left I/P
(3)Junction Block-Left I/P Connector C2
(4)C217
(5)Main Body Wiring Harness
(6)C217
Figure 13:

Lower Center of Instrument Panel (w/o 9C1/9C3)
Object Number: 487935 Size: LF
(1)G203
(2)Inflatable Restraint Steering Wheel Module Coil Connector C1
(3)Data Link Connector (DLC)
(4)C201
(5)Stop Lamp Switch Connectors
(6)Cruise Control Release Switch Connector
(7)Cruise Control Release Switch
(8)G201
Figure 14:

Lower Center of Instrument Panel
Object Number: 741398 Size: LF
(1)Steering Column
(2)A/T Shift Lock Control Solenoid (w/o D55)
(3)Fuse Block-SEO (9C1/9C3)
(4)Circuit Breaker #1, #2, #3 (9C1/9C3)
Figure 15:

Behind Center Left Side of Instrument Panel
Object Number: 514083 Size: LF
(1)Radio Connector C1
(2)Radio Connector C2
(3)G202
(4)Data Link Connector (DLC)
(5)HVAC Control Module Connector C1
(6)HVAC Control Module Connector C2
(7)G201
(8)Ignition Switch Connector C2
(9)Ignition Switch Connector C1
(10)Passlock Sensor Connector
(11)Ignition Switch
Figure 16:

Bottom Center of Instrument Panel (w/o D55)
Object Number: 488022 Size: LF
(1)Ashtray
(2)C240
(3)C240
Figure 17:

Lower Center of Instrument Panel (w/o D55)
Object Number: 571263 Size: LF
(1)Cigar Lighter
Figure 18:

Right Side of Instrument Panel
Object Number: 858671 Size: LF
(1)C218 (IP Harness)
(2)C218 (Main Body Harness)
(3)Junction Block-Right IP C2 (Main Body Harness)
(4)C225 (Main Body Harness)
(5)C225 (IP Harness)
(6)Junction Block-Right IP C2 (IP Harness)
Figure 19:

Behind Right Side of Instrument Panel (9C1/9C3)
Object Number: 593551 Size: LF
(1)Auxiliary Power Drop Connector
Figure 20:

Behind Right Side of Instrument Panel (SEO)
Object Number: 741574 Size: LF
(1)Blower Motor
(2)C255
(3)C297
(4)Emergency Vehicle Front Lamps Flasher
(5)C297
(6)C209
(7)C299
Figure 21:

Right Front Floor (SEO)
Object Number: 592705 Size: LF
(1)Wiring Blunt End (Coiled)
Figure 22:

Lower Left of Passenger Compartment
Object Number: 488359 Size: LF
(1)Inflatable Restraint Side Impact Sensor (SIS)-LF (Impala)
(2)G301
(3)Junction Block-Left IP Connector C2
(4)Park Brake Switch Connector
(5)C301
(6)C205
(7)C355 (Impala)
Figure 23:

Console and Center of Floor
Object Number: 885136 Size: LF
(1)Cigar Lighter
(2)Heated Seat Switch-Driver (Monte Carlo) Connector
(3)Heated Seat Switch-Front Passenger (Monte Carlo) Connector
(4)C317
(5)C315
(6)Auxiliary Power Outlet
(7)Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
(8)C312
(9)Inflatable Restraint Side Impact Module-LF Connector
(10)C311
(11)A/T Shift Lock Control Solenoid
Figure 24:

Lower Right of Passenger Compartment
Object Number: 858706 Size: LF
(1)C302
(2)C218
(3)Junction Block-Right I/P Connector (Main Body Harness Side)
(4)C225
(5)G302
(6)C306 (w/9C1/9C3)
(7)C308 (w/9C1/9C3)
Figure 25:

Right Lower Corner of Rear Window
Object Number: 488082 Size: LF
(1)G309
(2)Rear Window Defogger Grid Connector
Figure 26:

Roof (w/6F5)
Object Number: 867132 Size: MF
(1)Blunt Wiring End for Roof (w/6F5)
(2)P380 (w/6F5)
Figure 27:

Right Rear of Roof (w/6C8)
Object Number: 592719 Size: LF
(1)Coaxial Cable (Roof)
(2)Coaxial Cable (Rear Compartment)
Figure 28:

Rear Compartment Above Right Wheelhouse
Object Number: 742085 Size: LF
(1)C430
(2)C400
(3)Battery Feed
(4)Junction Block-Rear