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

Forward Lamp Wiring


Object Number: 323359  Size: MF
(1)G109
(2)C111
(3)C102
(4)G108
Figure 2:

Inflatable Restraint Forward Wiring


Object Number: 375567  Size: MF
(1)C114
Figure 3:

Forward Lamp Wiring, Horns


Object Number: 323365  Size: MF
(1)G108
(2)C102
(3)C111
(4)R100
Figure 4:

P/B Booster System Wiring


Object Number: 323371  Size: MF
(1)P103
(2)C113
(3)G112
(4)G108
Figure 5:

Engine, Upper RH Side (5.0L, 5.7L)


Object Number: 375573  Size: MF
(1)C112
(2)A/C Compressor Clutch
(3)Exhaust Gas Recirculation (EGR) Valve
(4)Engine Coolant Temperature (ECT) Sensor
(5)Evaporative Emission (EVAP) Canister Vacuum Switch
(6)C110
(7)Ignition Control Module
(8)Ignition Coil
(9)Fuel Injectors (1-8)
(10)Manifold Absolute Pressure (MAP) Sensor
Figure 6:

Glow Plug Controller (Federal)


Object Number: 395118  Size: MF
(1)Glow Plug Relay (Federal)
Figure 7:

Oxygen Sensor Wiring (5.0L, 5.7L, 7.4L Engines)


Object Number: 375606  Size: MF
(1)Heated Oxygen Sensor Bank 1, Sensor 2
(2)Heated Oxygen Sensor Bank 2, Sensor 2
(3)Catalytic Converter
(4)Heated Oxygen Sensor Bank 1, Sensor 1
(5)C105
(6)Heated Oxygen Sensor Bank 2, Sensor 1
Figure 8:

Wheel Speed Sensor Wiring


Object Number: 173451  Size: MF
(1)Wheel Speed Sensor, LF
(2)Wheel Speed Sensor, RF
(3)Connector C3
(4)Electronic Brake Control Module (EBCM)
Figure 9:

Fuel Pump Wiring


Object Number: 375609  Size: MF
(1)C301
(2)Electronic Brake Control Module (EBCM)
(3)Fuel Lift Pump
Figure 10:

Instrument Panel Wiring, Forward of Dash


Object Number: 345355  Size: MF
(1)Vehicle Control Module (VCM)
(2)Cruise Control Module
(3)P102
(4)Windshield Wiper Motor
Figure 11:

IP Fuse Block Wiring


Object Number: 323408  Size: MF
(1)P103
(2)C100
(3)G202
(4)G201