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

Engine Wiring 3100 Engine (L82)


Object Number: 48330  Size: LF
(1)Engine Control Module Electrical Connector
(2)Power Distribution Center Electrical Connector
(3)Knock Sensor Electrical Connector
(4)Camshaft Position Sensor Electrical Connector
(5)ECM Wiring Harness Electrical Connector
(6)Injector Electrical Connector
(7)Generator Electrical Connector
(8)Ignition Module Connector
(9)Ignition Module Connector
(10)Exhaust Gas Recirculation Solenoid Valve Electrical Connector
(11)Oxygen Sensor Electrical Connector
(12)Engine Coolant Temperature Gauge Electrical Connector
(13)Idle Air Control Electrical Connector
(14)Throttle Position Sensor Electrical Connector
(15)Fuel Pump Prime Electrical Connector
(16)Stepper Motor Cruise Control Electrical Connector
(17)Junction Block Positive Terminal
(18)Neutral Start Switch Electrical Connector
(19)Air Conditioning Intermediate Pressure Switch Electrical Connector
(20)Torque Converter Clutch Switch Electrical Connector
(21)Vehicle Speed Sensor Electrical Connector
(22)Engine Oil Level Sensor Electrical Connector
(23)Electric Engine Cooling Fan Switch Electrical Connector
(24)Engine Oil Pressure Switch Electrical Connector
(25)Engine Wiring Harness Start Lead
(26)Crankshaft Position Sensor Electrical Connector
(27)Air Conditioning Compressor Clutch Electrical Connector
(28)Engine Coolant Level Sensor Electrical Connector
(29)Canister Purge Solenoid Valve Electrical Connector
(30)Engine Wiring Harness Assembly
(31)Positive and Negative Battery Cable Assembly
Figure 2:

Engine Wiring 3400 Engine (LQ1)


Object Number: 49110  Size: LF
(1)Engine Control Module Electrical Connector
(2)Power Distribution Center Electrical Connector
(3)Injector Electrical Connector
(4)ECM Wiring Harness Electrical Connector
(5)Knock Sensor Electrical Connector
(6)Generator Electrical Connector
(7)Vehicle Speed Sensor Electrical Connector
(8)Mass Air Flow Sensor Electrical Connector
(9)Fuel Pump Prime Electrical Connector
(10)Stepper Motor Cruise Control Electrical Connector
(11)Neutral Start Switch Electrical Connector
(12)Idle Speed Power Steering Pressure Switch Electrical Connector
(13)Junction Block Positive Terminal
(14)Air Conditioning Intermediate Pressure Switch Electrical Connector
(15)Engine Wiring Harness Ground
(16)Engine Coolant Temperature Gauge Electrical Connector
(17)Direct Fire Module Electrical Connector
(18)Engine Oil Level Sensor Electrical Connector
(19)Electrical Engine Cooling Fan Switch Electrical Connector
(20)Engine Wiring Harness Start Lead
(21)Engine Oil Pressure Switch Electrical Connector
(22)Crankshaft Position Sensor Electrical Connector
(23)Electrical Engine Cooling Fan Extension Harness Electrical Connector
(24)Air Conditioning Compressor Clutch Electrical Connector
(25)Engine Low Coolant Sensor Electrical Connector
(26)Intake Air Temperature Sensor Electrical Connector
(27)Torque Converter Clutch Switch Electrical Connector
(28)Engine Wiring Harness Assembly
(29)Battery Positive and Negative Cable Assembly
(30)Electrical Engine Cooling Fan Switch Electrical Connector
Figure 3:

Engine Wiring 3800 Engine (L36)


Object Number: 49111  Size: LF
(1)Oxygen Sensor Electrical Connector
(2)Canister Purge Electrical Connector
(3)Throttle Position Sensor Electrical Connector
(4)Engine Coolant Temperature Sensor Electrical Connector
(5)Mass Air Flow Sensor Electrical Connector
(6)Vehicle Speed Sensor Electrical Connector
(7)Air Temperature Sensor Electrical Connector
(8)Fuel Pump Prime Electrical Connector
(9)Stepper Motor Cruise Control Electrical Connector
(10)Junction Block Positive Connector
(11)Torque Converter Clutch Electrical Connector
(12)Battery Positive Cable
(13)A/C Pressure Switch Electrical Connector
(14)Battery Negative Cable
(15)A/C Pressure Switch Electrical Connector
(16)Grounds Electrical Connector
(17)Engine Oil Level Sensor Electrical Connector
(18)Electric Engine Cooling Fan Electrical Connector
(19)A/C Compressor Electrical Connector
(20)Knock Sensor Electrical Connector
(21)Electric Engine Cooling Fan Electrical Connector
(22)A/C Compressor Electrical Connector
(23)Engine Oil Level Sensor Electrical Connector
(24)Engine Wiring Harness
(25)Engine Control Module Ground Electrical Connector
(26)Engine Low Coolant Level Electrical Connector
(27)Power Distribution Center Electrical Connector
(28)Engine Control Module Electrical Connector
(29)Generator Electrical Connector
(30)Injector Electrical Connector
(31)Electronic Ignition Electrical Connector
(32)ECM Wiring Harness Electrical Connector
(33)IAC Valve Electrical Connector