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

Automatic Transmission Harness, Upper Left Rear View


Object Number: 228797  Size: LF
(1)Backup Lamps Switch
(2)Vehicle Speed Sensor (VSS)
(3)Neutral Switch
(4)Front Chassis Harness
Figure 2:

Accelerator Pedal Position (APP) Sensor


Object Number: 397650  Size: LF
(1)Accelerator Pedal Position (APP) Sensor
Figure 3:

Right Side of the Engine (LG4)


Object Number: 228805  Size: LF
(1)Engine Harness
(2)Generator Fuse
(3)Generator
(4)A/C Compressor Clutch (C60)
(5)A/C Compressor (C60)
(6)Engine Oil Pressure (EOP) Sensor
Figure 4:

Top Center of Flywheel Housing


Object Number: 397634  Size: MF
(1)Crankshaft Position (CKP) Sensor (Allison® LCT)
Figure 5:

Fuel Senders, G400, Low Air Alarms, Splice Pack SP400 (Ground Block) - LG4/LG5


Object Number: 953488  Size: LF
(1)Fuel Sender - Primary
(2)Fuel Tank
(3)Low Air Pressure Switch - Primary
(4)Low Air Pressure Switch - Secondary
(5)Splice Pack SP400 (Ground Block - 6 cavities)
(6)Fuel Sender - Secondary Connector
(7)Ground G400
(8)Fuel Sender - Secondary
(9)Fuel Tank - Secondary
Figure 6:

Fuel Tank Harness, Left Side


Object Number: 628248  Size: LF
(1)Fuel Sending Unit Connector
(2)Fuel Tank Sender
(3)Fuel Transfer Pump Connector
(4)Fuel Transfer Pump
(5)Back of Cab Crossmember
(6)Fuel Tank Harness
(7)C411
(8)Rear Chassis Harness
Figure 7:

Left Rear Engine View


Object Number: 397647  Size: LF
(1)Fuel Injector Connector C123 - to the fuel injector harness connector adapter 2
(2)Glow Plug 5
(3)Fuel Temperature Sensor
(4)Glow Plug 6
Figure 8:

Top of Engine, Front, Under Valve Cover


Object Number: 1507904  Size: LF
(1)Fuel Injector 1
(2)Fuel Injector 2
(3)C122 (8 cavities)
(4)Fuel Injector 3
(5)Glow Plug 3
(6)Glow Plug Bus 2
(7)Fuel Injector Harness Connector Adapter 1 (C122)
(8)Glow Plug 2
(9)Glow Plug Bus 1
(10)Glow Plug 1
Figure 9:

Top of Engine, Rear, Under Valve Cover


Object Number: 1507905  Size: LF
(1)Fuel Injector 4
(2)C123 (8 cavities)
(3)Fuel Injector 5
(4)Fuel Injector 6
(5)Glow Plug 6
(6)Glow Plug Bus 2
(7)Glow Plug 5
(8)Fuel Injector Harness Connector Adapter 2 (C123)
(9)Glow Plug 4
(10)Glow Plug Bus 1
Figure 10:

Top Left Side of Engine, Intake


Object Number: 1715204  Size: MF
(1)Boost Pressure Sensor
(2)Intake Manifold