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

Front Engine Compartment


Object Number: 1554832  Size: LF
(1)Battery Positive Voltage
(2)Starter Solenoid
(3)Starter Motor
(4)G100
(5)OnStar Fuse
(6)Battery
(7)Generator Connector
(8)Generator
Figure 2:

Fuse Block - Underhood Connectors


Object Number: 1550561  Size: LF
(1)C125 Body Harness to Engine Harness (Transfer Case)
(2)Fuse Block - Underhood C4 (Engine Harness)
(3)Fuse Block - Underhood C3 (Engine Harness)
(4)C115 Forward Lamp Harness to Body Harness
(5)Fuse Block - Underhood C1 (Body Harness)
(6)Fuse Block - Underhood C2 (Body Harness)
Figure 3:

Ground Locations


Object Number: 1550554  Size: LF
(1)G106
(2)G320
(3)G310
(4)G340
(5)Chassis Harness
(6)G420
(7)G345 and or G350
(8)Body Harness
(9)G300
(10)Battery Positive Voltage (Starter Solenoid)
(11)Starter Crank Voltage
(12)G102
(13)G120 (Ground Strap-Chassis)
(14)G103
(15)G110 (Ground Strap-Engine Block)
(16)G104 (Negative Battery Cable)
(17)G105
(18)G100 (Battery Ground)
(19)Engine Harness
Figure 4:

Engine Components - Left Side (L52)


Object Number: 1563749  Size: LF
(1)Evaporative Emission (EVAP) Canister Purge Soleniod Valve
(2)Starter Solenoid
(3)Knock Sensor (KS) Bank 2
(4)Crankshaft Position (CKP) Sensor
(5)G102
(6)G103
(7)Engine Block Heater
(8)Camshaft Position (CMP) Sensor - Intake
(9)Camshaft Position (CMP) Sensor - Exhaust
Figure 5:

Steering Column Harness Components


Object Number: 1550693  Size: LF
(1)Inflatable Restraint Steering Wheel Module Coil
(2)Inflatable Restraint Steering Wheel Module Connectors
(3)Ignition Switch
(4)Ignition Lock Cylinder Control Actuator (M30)
(5)Steering Wheel Position Sensor (JL4)
(6)C201 Steering Column Harness to I/P Harness
(7)C275 Steering Column Harness to I/P Harness
(8)Ignition Switch
(9)Turn Signal/Multifunction Switch