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

Forward Lamp Harness (L61)


Object Number: 1338710  Size: MF
(1)Marker Lamp - RF (2 GY)
(2)Park/Turn Signal Lamp - RF (3 GY)
(3)Headlamp - Right Low Beam (2 BK)
(4)Headlamp - Right High Beam (2 BK)
(5)Headlamp - Left High Beam (2 BK)
(6)Headlamp - Left Low Beam (2 BK)
(7)Fuse Block - Underhood C1
(8)C106
(9)S111
(10)Park/Turn Signal Lamp - LF (3 GY)
(11)Marker Lamp - LF (2 GY)
(12)Windshield Washer Fluid Pump (2 BK)
(13)Horn (2 GY)
(14)Cooling Fan Resistor (2 GY)
(15)Splice Pack SP301, G101
(16)Daytime Running Lamp (DRL) Resistor (2 BK)
(17)Fog Lamp - Left (2 BK) (w/T96)
(18)Cooling Fan (3 TN)
(19)Ambient Air Temperature Sensor (2 L-GN) (w/HAA)
(20)Fog Lamp - Right (2 BK) (w/T96)
Figure 2:

Forward Lamp Harness (L66)


Object Number: 1338706  Size: MF
(1)Headlamp - Left Low Beam (2 BK)
(2)Park/Turn Signal Lamp - LF (3 GY)
(3)Fuse Block - Underhood C1
(4)C106
(5)Marker Lamp - LF (2 GY)
(6)Horn (2 GY)
(7)Splice Pack SP301, G101
(8)Daytime Running Lamp (DRL) Resistor (2 BK)
(9)Fog Lamp - Left (2 BK)
(10)Cooling Fan Relay 3 (5 BK)
(11)Cooling Fan - Left (3 TN)
(12)Headlamp - Left High Beam (2 BK)
(13)Ambient Air Temperature Sensor (2 L-GN)
(14)Cooling Fan - Right (3 TN)
(15)Fog Lamp - Right (2 BK)
(16)Headlamp - Right High Beam (2 BK)
(17)Headlamp - Right Low Beam (2 BK)
(18)Marker Lamp - RF (2 GY)
(19)Park/Turn Signal Lamp - RF (3 GY)
Figure 3:

Front of Engine Compartment (L61)


Object Number: 1760296  Size: LF
(1)Fuse Block - Underhood C2
(2)C102 Engine Harness to Body Harness
(3)Park Neutral Position (PNP) Switch
(4)C100 Engine Harness to Transmission Harness
(5)G105
(6)C150 Engine to Fuel Injector Harness
(7)G107
Figure 4:

Left Side of Engine (L66)


Object Number: 1760277  Size: LF
(1)Manifold Absolute Pressure (MAP) Sensor
(2)Fuse Block-Underhood C2
(3)Starter Relay
(4)G107
(5)Torque Converter Clutch (TCC) Pressure Control Solenoid Valve
(6)4th Clutch Pressure Switch
(7)Clutch Pressure Control Solenoid Valve 1
(8)Clutch Pressure Control Solenoid Valve 2
(9)Transmission Fluid Temperature (TFT) Sensor
(10)3rd Clutch Pressure Switch
(11)Transmission Output Shaft Speed Sensor
(12)Transmission Input Shaft Speed Sensor
(13)Park / Neutral Position (PNP) Switch
(14)C100 Engine Harness to Transmission Harness
(15)Engine Coolant Temperature (ECT) Sensor
(16)Exhaust Gas Recirculation (EGR) Valve
(17)Intake Air Temperature (IAT) Sensor 2
Figure 5:

Rear Engine View (L66)


Object Number: 1760279  Size: LF
(1)Evaporative Emission (EVAP) Canister Purge Solenoid Valve
(2)Splice Pack SP113
(3)C102
(4)Powertrain Control Module (PCM)
(5)Rocker Arm Oil Control Solenoid Pigtail Connector
(6)C103 (Crankshaft Position (CKP) Sensor Pigtail)
(7)Rocker Arm Oil Control Solenoid
(8)Engine Oil Pressure (EOP) Switch
(9)Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
(10)Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
(11)Splice Pack SP114
Figure 6:

I/P Harness Routing


Object Number: 1345232  Size: MF
(1)Inflatable Restraint Steering Wheel Module Coil C3
(2)Instrument Panel Cluster (IPC)
(3)I/P Fuse Block C2,C3
(4)G203
(5)C202 - HVAC Harness to the I/P Harness Connector
(6)C304 - Shifter Assembly Harness to the I/P Harness
(7)C203 - I/P Harness to the Inflatable Restraint I/P Module Jumper Harness Connector
(8)S205
(9)Splice Pack SP201, G201
(10)C311 - Body Harness to the I/P Harness Connector
(11)C308 - SDM Harness to the SIS Harness Connector (ASF)
(12)S202, C307 - Roof Rail Module Harness to the SDM Harness Connector (ASF)
(13)C303 - Headliner Harness to the I/P Harness Connector (UE1)
(14)C201 - Auxiliary Outlet Harness to the I/P Harness Connector
(15)C204 - I/P Harness to the Digital Radio Harness Connector (U2K)
(16)S203
(17)C200 - I/P Harness to the Body Harness Connector
(18)Data Link Connector (DLC)
(19)Splice Pack SP203
(20)Inflatable Restraint Steering Wheel Module Coil C5
Figure 7:

Body Harness Routing


Object Number: 1650891  Size: MF
(1)S204
(2)C106, Body Harness to the Forward Lamp Harness
(3)C102 (L61), Engine Harness to the Body Harness
(4)C105, RF WSS Harness to the Body Harness
(5)C102 (L66), Body Harness to the Engine Harness
(6)C204, I/P Harness to the Body Harness
(7)C311, I/P Harness to the Body Harness
(8)S600 and S601
(9)C306, Body Harness to the Passenger Seat Harness
(10)C310, Body Harness to the Right Seat Belt Pretensioner Jumper Harness
(11)C402 and C403, Liftgate Harness to the Body Harness
(12)C800, Body Harness to the RR Door Harness
(13)C401, Body Harness to the Right Tail Lamp Harness
(14)C404, Body Harness to the Rear WSS Harness
(15)C406, Body Harness to the Fuel Tank Harness
(16)C300, Body Harness to the Headliner Harness
(17)C400, Body Harness to the Left Tail Lamp Harness
(18)C305, Driver Seat Harness to the Body Harness
(19)C309, Body Harness to the Left Seat Belt Pretensioner Jumper Harness
(20)C700, Body Harness to the LR Door Harness
(21)S304
(22)S209
(23)C200, I/P Harness to the Body Harness
(24)S500 and S501
(25)C104, LF WSS Harness to the Body Harness
Figure 8:

Headliner Harness Routing


Object Number: 1344966  Size: MF
(1)Inside Rearview Mirror (ISRM)
(2)Courtesy/Map Lamps
(3)Sunroof Switch
(4)Cellular Telephone Microphone
(5)Dome Lamp - Front
(6)Dome Lamp - Rear
(7)S302
(8)S303
(9)C302 - Sunroof Harness to Headliner Harness Connector
(10)S301
(11)C300 - Body Harness to Headliner Harness Connector
(12)C303 - Headliner Harness to I/P Harness Connector
Figure 9:

Liftgate Harness


Object Number: 1338703  Size: MF
(1)Body Harness to the Liftgate Harness Connector C403
(2)Body Harness to the Liftgate Harness Connector C402
(3)S402
(4)S400
(5)S407
(6)Liftgate Lamp - Left
(7)License Lamp Harness to the Liftgate Harness Connector C405
(8)Liftgate Lock Actuator/Ajar Switch
(9)Wiper Motor - Rear
(10)Liftgate Lamp - Right