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

Inline Connectors


Object Number: 1395304  Size: MF
(1)C109
(2)C108
(3)C102
(4)C107 (w/4.6L)
(5) C110 (w/4.6L)
(6) C139 (w/4.6L)
(7)C101
(8)C112
(9)C200
(10)C202
(11)C302
(12)C303
(13)C205
(14)C204
(15)C201
(16)C500
(17)C503
(18)C700
(19)C703
(20)C600
(21)C603
(22)C800
(23)C803
(24)C301
(25)C406
(26)C140 (w/4.6L)
(29)C329
(30)C401
(31)C402
(32)C420
(33)C405
(34)C400
Figure 2:

Harness Pass Throughs


Object Number: 596663  Size: LF
(1)P103
(2)P102
(3)P104
(4)P600
(5)P800
(6)P400
(7)P402
(8)P410
(9)P403
(10)P401
(11)P700
(12)P500
(13)P100
Figure 3:

Upper Side of Engine - 3.8L


Object Number: 460305  Size: LF
(1)Exhaust Gas Recirculation (EGR) Valve
(2)Fuel Injector #6
(3)Fuel Injector #4
(4)Fuel Injector #2
(5)To the Generator
(6)To the Air Solenoid
(7)Heated Oxygen Sensor (H02S) Bank 1 Sensor 1
(8)S103
(9)S104
(10)To the Powertrain Control Module (PCM)
(11)C100
Figure 4:

Upper Front of Engine - 3.8L


Object Number: 460302  Size: LF
(1)Fuel Injector 3
(2)Evaporative Emission (EVAP) Purge Canister
(3)Fuel Injector 5
(4)Idle Air Control (IAC) Valve
(5)Throttle Position (TP) Sensor
(6)Mass Air Flow (MAF) Sensor
(7)S106
(8)Engine Coolant Temperature (ECT) Sensor
(9)C103
(10)S108
(11)S107
(12)Ignition Control Module (ICM)
(13)To the Manifold Absolute Pressure (MAP) Sensor
(14)Fuel Injector 1
Figure 5:

Rear of the Engine, Below the Power Steering Pump - 3.8L


Object Number: 629391  Size: MF
(1)S101
(2)S102
Figure 6:

Left Front Corner of the Vehicle


Object Number: 596709  Size: MF
(1)C108 (Left); C109 (Right)
(2)Horn Assembly
(3)Foglamp (Left Shown, Right Similar)
(4)Forward Lamp Harness
(5)Headlamp Assembly (Left Shown, Right Similiar)
(6)Radiator
Figure 7:

Engine Compartment, in the Left Front Corner - 3.8L


Object Number: 460288  Size: LF
(1)Powertrain Control Module (PCM) C1
(2)Powertrain Control Module (PCM) C2
(3)Air Cleaner Assembly
(4)Powertrain Control Module (PCM)
(5)S105
Figure 8:

Engine Compartment, In the Right Front Corner


Object Number: 575865  Size: MF
(1)Body Harness
(2)Fuse Block-Underhood C2
(3)Forward Lamp Harness
(4)G103, SP103
(5)S100
(6)Fuse Block-Underhood C1
(7)C102
Figure 9:

Engine Compartment, On the Left Side


Object Number: 735444  Size: LF
(1)Brake Fluid Level Switch
(2)Cruise Control Module (CCM)
(3)SP106, G106
(4)Inflatable Restraint Front End Discriminating Sensor
(5)C101
(6)P100
(7)C112
Figure 10:

Engine, on the Left Side - 4.6L


Object Number: 598784  Size: MF
(1)Exhaust Gas Recirculation (EGR) Valve
(2)Engine Coolant Temperature (ECT) Sensor
(3)G109
(4)C101
(5)S103
(6)S104
(7)C100
(8)Throttle Position (TP) Sensor
(9)Idle Air Control (IAC) Sensor
(10)Manifold Absolute Pressure (MAP) Sensor
Figure 11:

Engine Compartment, Top of Engine - 4.6L


Object Number: 1394556  Size: MF
(1)C139 (C140 Similar)
(2)Ignition Coil/Module 8 (7 similar)
(3)Ignition Coil/Module 6 (5 similar)
(4)Ignition Coil/Module 4 (3 similar)
(5)Ignition Coil/Module 2 (1 similar)
Figure 12:

Left Rear of the Engine Compartment - 3.8L


Object Number: 524948  Size: LF
(1)C101
(2)S104
(3)S103
(4)P100
Figure 13:

Engine Compartment, Right Rear Corner of the Engine - 4.6L


Object Number: 524937  Size: LF
(1)S101
(2)S102
(3)C107
(4)C140
Figure 14:

Passenger Compartment, Lower Left Front Corner


Object Number: 899261  Size: LF
(1)S215
(2)S216
(3)P100
(4)Inflatable Restraint Steering Wheel Module Coil
(5)C200
(6)C202
(7)To Stop Lamp Switches
(8)C500
(9)SP200, G200
(10)S217
(11)Park Brake Switch
Figure 15:

Passenger Compartment, In the Right Front Corner


Object Number: 575861  Size: MF
(1)Blower Motor Connector
(2)Inflatable Restraint IP Module
(3)SP201, G201
(4)C600
(5)Right Side Body Harness
(6)Dash Integration Module (DIM), C1
(7)Dash Integration Module (DIM), C2
(8)Dash Integration Module (DIM), C3
(9)P102
(10)C201
(11)S210
Figure 16:

Instrument Panel, Behind the Left Side


Object Number: 595257  Size: MF
(1)Instrument Panel Integration Module (IPM)
(2)Instrument Panel Integration Module (IPM) C1
(3)Instrument Panel Integration Module (IPM) C2
(4)S202
(5)S200
(6)Data Link Connector (DLC)
(7)C200
Figure 17:

Instrument Panel, Right Side Rear View


Object Number: 599816  Size: MF
(1)C201
(2)S206
(3)S205
(4)C205
(5)C204
(6)Courtesy Lamp Connector
(7)Rear Compartment Lid Release Switch Connector
(8)S207
Figure 18:

Dash Panel, Right Front View


Object Number: 596721  Size: MF
(1)Radio Antenna Connector
(2)Antenna Cable
(3)C201
Figure 19:

Instrument Panel, Left Side Wiring


Object Number: 899260  Size: MF
(1)S203
(2)Turn Signal/Hazard Flasher Module
(3)Cigar Lighter (w/o D55)
(4)C210
(5)C211 (w/o D55)
(6)Cigar Lighter (w/ D55)
(7)Head Up Display Switch
(8)Headlamp Switch
(9)Air Temperature Sensor - Inside
(10)Head Up Display (HUD)
(11)S208
(12)S204
(13)Sunload Sensor Assembly
(14)Drivers Infomation Center (DIC)
Figure 20:

Under Right Side of Dash


Object Number: 482184  Size: MF
(1)C205 (CJ2)
(2)S222
(3)S221
(4)S220
(5)C204 (C67)
Figure 21:

Center Console (w/ Console Shift)


Object Number: 596731  Size: MF
(1)C211(w/o D55)
(2)S228
(3)S229
(4)C210
Figure 22:

Passenger Compartment, Wiring Harness Under the Carpet


Object Number: 596773  Size: LF
(1)S401
(2)S307
(3)SP306
(4)S302
(5)S305
(6)S304
(7)S303
(8)SP301
(9)C301
(10)SP310
(11)C301
(12)C303
(13)Battery
(14)S309
(15)S308
(16)Fuse Block -- Rear
Figure 23:

Under the Right Front Seat


Object Number: 596737  Size: MF
(1)Right Front Seat (Left Similiar)
(2)C301 (Right); C302 (Left)
(3)Inflatable Restraint Side Impact Module - Right (Left Side Similiar)
Figure 24:

LH Front Seat Back


Object Number: 492615  Size: MF
(1)Lumbar Vertical Position Sensor
(2)Lumbar Vertical Motor
(3)Seat Recline Motor - Driver
(4)S331
(5)S330
(6)Lumbar Horizontal Motor
(7)Lumbar Horizontal Position Sensor
Figure 25:

Front Seat Wiring


Object Number: 596681  Size: LF
(1)LH S315, RH S316
(2)LH S324, RH S322
(3)LH S321, RH S323
(4)LH C314, RH C317
(5)LH C318
(6)LH S317
(7)LH S319
(8)LH S320
Figure 26:

Passenger Compartment, Under the Right Side of the Rear Seat


Object Number: 575864  Size: MF
(1)G305
(2)Body Harness, Right Side
(3)Battery
(4)C305
(5)S345 (w/UE1)
(6)Battery Positive Cable
(7)Fuse Block - Rear
Figure 27:

Passenger Compartment, Left Rear


Object Number: 596751  Size: MF
(1)C406
(2)Body Harness, Left
(3)Rear Shelf Harness
Figure 28:

Rear Compartment, Behind the Rear Seat Back (w/UE1)


Object Number: 648406  Size: MF
(1)Vehicle Interface Unit (VIU)
(2)OnStar® GPS Antenna Lead
(3)Vehicle Communication Unit (VCU)
(4)S360 and S361
(5)C345 (Body Harness to OnStar® Harness)
(6)OnStar® Cellular Antenna Lead
Figure 29:

Rear Compartment, Behind the Rear Seat Back (Late Production)


Object Number: 648406  Size: MF
(1)Vehicle Communication Interface Module (VCIM)
(2)OnStar® GPS Antenna Lead
(3)Vehicle Communication Interface Module (VCIM)
(4)S360 and S361
(5)C345 (Body Harness to OnStar® Harness)
(6)OnStar® Cellular Antenna Lead
Figure 30:

Passenger Compartment, Near the Left Rear Pillar


Object Number: 596748  Size: MF
(1)Headliner Harness
(2)Left Body Harness
(3)C329
Figure 31:

Right Front Door Wiring


Object Number: 461054  Size: LF
(1)P500(LH) P600(RH)
(2)C500(LH) C600(RH)
(3)Inline To Body Harness (LH Similar)
(4)Door Harness (LH Similar)
Figure 32:

Right Front Door Module


Object Number: 461047  Size: LF
(1)Front Passenger Door Module (FPDM) (C3) (DDM Similar)
(2)Front Passenger Door Module (FPDM) (C1) (DDM Similar)
(3)Front Passenger Door Module (FPDM) (C2) (DDM Similar)
(4)Front Passenger Door Module (FPDM) (C4) Outside Power Mirror Pigtail (DDM Similar)
(5)C503 (LH) C603 (RH)
(6)Front Passenger Door Module (FPDM) (DDM Similar)
(7)S500 (LH) S602 (RH)
Figure 33:

Right Rear Door (Left Door Similiar)


Object Number: 735339  Size: MF
(1)C800 (Right); C700 (Left)
(2)P800 (Right); P700 (Left)
Figure 34:

Right Rear Door


Object Number: 596745  Size: MF
(1)Door Lock Actuator - RR; (LR Similar)
(2)Window Motor - RR ; (LR Similar)
(3)C803 (Right); C703 (Left)
(4)Right Rear Door Module (RRDM); (LRDM Similiar)
Figure 35:

Rear Compartment Lid Wiring


Object Number: 492956  Size: LF
(1)S412
(2)S411
(3)S413
Figure 36:

Left Rear Corner of the Vehicle


Object Number: 596757  Size: MF
(1)P403 (Left); P402 (Right)
(2)Tail Lamp Assembly
(3)Tail Lamp Jumper Harness
(4)Body Harness
(5)C400 (Left); C402 (Right)
Figure 37:

Under the Right Rear of the Vehicle


Object Number: 596754  Size: MF
(1)P401 (Right); P400 (Left)
(2)C420 (Right Body Harness); C401 (Left Body Harness)
(3)Fuel Tank Jumper Harness
(4)Left Body Harness (Right Body Harness Similar)
(5)Automatic Level Control (ALC) Compressor