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

Accelerator Pedal


Object Number: 1155067  Size: LF
(1)Accelerator Pedal Position (APP) Sensor Connector
(2)Accelerator Pedal Position (APP) Sensor
(3)Accelerator Pedal
(4)C201 (48 cavities)
Figure 2:

Air Cleaner Assembly


Object Number: 822049  Size: LF
(1)Engine Chassis Harness
(2)Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor
Figure 3:

Air Compressor (K16), Fuel Tanks and Trailer Connector (RQ2 and U86 or RQ3)


Object Number: 1014827  Size: LF
(1)Splice Pack SP400 (Ground Block)
(2)C409 (8 cavities) Fuel Tank Harness to the Chassis Harness
(3)Fuel Pump (FP) Relay
(4)Fuel Sender - Secondary
(5)Fuel Tank Transfer Pump - Secondary
(6)Trailer Connector (RQ2 and U86 or RQ3)
(7)C410 (3 cavities - K16) Chassis Harness to the Air Compressor Harness
(8)Air Compressor Connector (K16)
(9)Air Compressor Relay (K16)
(10)Air Compressor (K16)
(11)Fuel Sender - Primary
Figure 4:

ECM/TCM View


Object Number: 1422659  Size: LF
(1)Engine Control Module (ECM)
(2)Transmission Control Module (TCM)
Figure 5:

Front of Vehicle


Object Number: 826867  Size: LF
(1)Chassis Harness
(2)Vacuum Pump
(3)Coolant Level Switch Connector
(4)Engine Fan Harness
(5)Vacuum Pump Connector
(6)C106
(7)C106
Figure 6:

Instrument Panel


Object Number: 1699704  Size: LF
(1)Trailer Park Brake Control (JE4)
(2)Park Brake Control (JE4)
(3)Gage Center
(4)Inflatable Restraint I/P Module (AK5)
(5)Auxiliary Power Outlets
(6)Air Brake Pressure Gage (JE4)
(7)Transfer Case Shift Control Switch (NP1)
(8)Traction Control Switch (NW9)
(9)Outside Heated Mirror Switch (DB6/DB8)
(10)Exhaust Brake Switch (K40)
(11)Rear Axle Driver Control Switch - Two Speed (HPZ/Automatic Transmission)
(12)Inflatable Restraint I/P Module Disable Switch (AK5 w/o AQR)
(13)Differential Lock Switch (HNB/HPL/HPN) or Inter-Axle Differential Lock Switch (Tandem Axle)
(14)Switch
(15)Air Suspension Dump Switch (G40/G45/GSJ)
(16)Diesel Particulate Filter (DPF) (Diesel Only)
(17)Marker Lamp Switch (RQ2 and U86 or RQ3)
(18)High Idle Switch (UF3)/Power Take-Off (PTO) Switch
(19)Air Cleaner Restriction Gage (UPM)
(20)Automatic Transmission Fluid Temperature (TFT) Gage (Allison® LCT/UXT)
(21)I/P Switchbank
(22)HVAC Control Assembly (C40/C60)
(23)Driver Information Center (DIC)
(24)Radio (w/o UL5)
(25)Inflatable Restraint Steering Wheel Module (AJ3/AK5)
(26)Headlamp Switch
(27)Turn Signal/Multifunction Switch
(28)Instrument Panel Cluster (IPC)
Figure 7:

Left Side of the Engine


Object Number: 1809262  Size: LF
(1)Intake Air Temperature (IAT) Sensor
(2)Turbocharger Vane Position (TVP) Sensor
(3)Fuel Injector 8
(4)Glow Plug 8
(5)Fuel Injector 6
(6)Glow Plug 6
(7)Engine Oil Pressure (EOP) Sensor
(8)Water-In-Fuel Sensor
(9)Glow Plug 4
(10)Fuel Injector 4
(11)Engine Oil Level Switch
(12)Glow Plug 2
(13)Fuel Injector 2
(14)Turbocharger Vane Position (TVP) Sensor Connector
(15)Barometric Pressure (BARO) Sensor
Figure 8:

Right Side of the Engine


Object Number: 1809265  Size: LF
(1)Fuel Injector 7
(2)Fuel Injector 5
(3)Fuel Injector 3
(4)Fuel Rail Pressure (FRP) Sensor
(5)Fuel Injector 1
(6)Exhaust Gas Recirculation (EGR) Valve
(7)Manifold Absolute Pressure (MAP) Sensor
(8)Intake Air (IA) Heater
(9)Glow Plug Controller
(10)Crankshaft Position (CKP) Sensor
(11)Glow Plug 1
(12)Block Heater
(13)Glow Plug 3
(14)Starter
(15)Glow Plug 5
(16)Glow Plug 7
Figure 9:

Top of the Engine


Object Number: 1809267  Size: LF
(1)Exhaust Gas Recirculation (EGR) Valve
(2)Fuel Pump
(3)Intake Air Temperature (IAT) Sensor
(4)Turbocharger Vane Position (TVP) Control Solenoid Valve
(5)Fuel Temperature Sensor
(6)Camshaft Position (CMP) Sensor
(7)Glow Plug Controller
Figure 10:

Under the Throttle Body (LLY)


Object Number: 1957507  Size: LF
(1)Engine Coolant Temperature (ECT) Sensor