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

Body Harness Routing - Front Engine Compartment (L66)


Object Number: 1776197  Size: LF
(1)Powertrain Control Module (PCM) Bracket
(2)C105
(3)C102 (L66)
(4)Body Harness
(5)Fuse Block - Underhood
(6)C106
(7)Body Harness
(8)C108
Figure 2:

Left Side of Engine Compartment (LAT)


Object Number: 1760313  Size: LF
(1)Fuse Block - Underhood
(2)Heater Core Pump
(3)Park Neutral Position (PNP) Switch
(4)Transmission Control Module (TCM)
(5)Battery - 12V
(6)Electronic Control Module (ECM)
(7)Fuse Block - Underhood - Auxiliary
Figure 3:

Above the Spare Tire


Object Number: 1760395  Size: LF
(1)Instrument Panel
(2)Wheel Well - RR
(3)Generator Battery - 36V
(4)Generator Battery - 36V
(5)Generator Battery Vent Fan
(6)Generator Battery Disconnect Control Module
(7)Generator Battery Service Disconnect Switch
Figure 4:

Forward Lamp Harness Routing (LAT)


Object Number: 1778648  Size: LF
(1)C106
(2)Fuse Block - Underhood
(3)C122
(4)Daytime Running Lamp (DRL) Resistor
(5)Cooling Fan Resistor
(6)Splice Pack SP101
(7)G101
(8)S111
Figure 5:

Left Side of Engine Compartment


Object Number: 1760371  Size: LF
(1)Fuse Block - Underhood
(2)Battery Cables - Positive
(3)Battery Cable Terminal - Positive
(4)Battery - 12V
(5)Battery Cables - Negative
(6)G103
(7)Junction Block - Battery Cable - Positive
(8)G105
(9)Starter Generator Battery Cable - Positive
(10)Engine Block
Figure 6:

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 7:

Front of Engine - L61 (w/MG3)


Object Number: 1810911  Size: LF
(1)Manual Transmission (MG3)
(2)G105
(3)G107
Figure 8:

Top of Engine (L66)


Object Number: 1760276  Size: LF
(1)Fuel Injector 6
(2)Ignition Coil 6
(3)Fuel Injector 5
(4)Ignition Coil 5
(5)Ignition Coil 4
(6)Fuel Injector 4
(7)Camshaft Position (CMP) Sensor
(8)Knock Sensor (KS)
(9)G109
(10)Ignition Coil 1
(11)Fuel Injector 1
(12)Ignition Coil 2
(13)Fuel Injector 2
(14)Ignition Coil 3
(15)Fuel Injector 3
Figure 9:

Lower Center of the I/P


Object Number: 1779072  Size: LF
(1)Right Side of Instrument Panel
(2)G203
(3)Fuse Block - I/P
Figure 10:

Body Harness Routing - Lower Left Side of I/P


Object Number: 1776826  Size: LF
(1)Body Harness
(2)G205/Splice Pack (SP205) (JM4)
(3)C200
(4)S501
(5)S500
(6)S204
Figure 11:

Body Harness Routing - Passenger Compartment


Object Number: 1776896  Size: LF
(1)Instrument Panel (I/P) Trim
(2)Body Harness
(3)C306 (AG1/KA1)
(4)C305 (AG1/KA1)
(5)G301
(6)Splice Pack SP301
(7)S304
(8)C204 (U2K)
(9)S209
(10)Fuse Block - I/P
(11)Windshield
Figure 12:

Body Harness Routing - Left Side of Passenger Compartment


Object Number: 1777178  Size: LF
(1)C400
(2)Tail Lamp - LR
(3)C300
(4)Splice Pack SP401
(5)G401
(6)Door Jamb Switch - LR
(7)Left C Pillar
(8)C309
(9)Seat Belt Pretensioner - Left
(10)Door Panel - LR
(11)C700
(12)Liftgate
Figure 13:

Body Harness Routing - Rear Compartment Area


Object Number: 1777205  Size: LF
(1)Seat Belt Pretensioner - Right
(2)C310
(3)G403
(4)Splice Pack SP403
(5)C401
(6)Tail Lamp - RR
(7)Cellular/Navigational/Digital Antenna
(8)Liftgate
(9)C403
(10)C402
(11)C800