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

Information Sensors/Input Devices


Object Number: 471720  Size: LF
(1)Fuel Tank Pressure Sensor
(2)Fuel Level Sensor
(3)ECT Sensor
(4)CMP Sensor
(5)HO2S 2 (without WU-TWC)
(6)ABS Control Module
(7)HO2S 1
(8)HO2S 2 (with WU-TWC)
(9)PSP Switch (if equipped)
(10)MAF Sensor
(11)IAT Sensor
(12)Electrical Load Diode
(13)TP Sensor
(14)MAP Sensor
(15)CKP Sensor (located behind flywheel/flexplate)
(16)A/C Compressor Control Module
(17)VSS
Figure 2:

PCM Controlled Devices


Object Number: 471742  Size: LF
(1)Malfunction Indicator Lamp (MIL)
(2)Main Relay
(3)Fuel Pump Relay
(4)Ignition Coils
(5)EVAP Canister Purge Valve
(6)EVAP Canister Vent Solenoid
(7)EVAP Tank Pressure Control Solenoid Valve
(8)A/C Condenser Fan Relay
(9)Idle Air Control (IAC) Valve
(10)Exhaust Gas Recirculation (EGR) Valve
(11)Fuel Injectors
Figure 3:

Other Engine Control System Components


Object Number: 471748  Size: LF
(1)Instrument Panel (includes speedometer)
(2)Data Link Connector (DLC)
(3)EVAP Canister
(4)Powertrain Control Module (PCM)
(5)Battery
(6)Noise Filter (ignition system)
Figure 4:

EVAP System Components and Engine Controls


Object Number: 471931  Size: MF
(1)PCV Hose
(2)PCV Breather Hose
(3)Fuel Pressure Regulator
(4)TP Sensor
(5)IAC Valve
(6)EVAP Canister Purge Valve
(7)EVAP Canister
(8)EVAP Canister Vent Solenoid
(9)Fuel Tank Pressure Control Valve
(10)EVAP Tank Pressure Control Solenoid Valve
(11)Fuel Return Hose
(12)Fuel Feed Hose
(13)MAP Sensor
(14)A/T Throttle Cable
(15)Accelerator Control Cable
Figure 5:

ECT Sensor and EGR Valve


Object Number: 468060  Size: MH
(1)EGR Valve
(2)ECT Sensor
(3)Fuel Injector Electrical Harness Connector
(4)Throttle Body Inlet Coolant Line
(5)Throttle Body Outlet Coolant Line
(6)IAC valve
(7)EVAP Canister Purge Valve
(8)TP Sensor
(9)Fuel Lines
(10)Engine Grounds
(11)MAP Sensor
Figure 6:

Ignition System


Object Number: 467906  Size: SH
(1)Ignition Coils
(2)Noise Suppressor
(3)PCM
(4)CMP Sensor
(5)Spark Plugs
Figure 7:

Main Relay and Fuel Pump Relay


Object Number: 468070  Size: SH
(1)Main Relay
(2)Fuel Pump Relay
(3)Junction Box (located above left side hinge pillar trim panel)
Figure 8:

Electrical Load Diode


Object Number: 587746  Size: SH
(1)Electrical Load Diode (taped to wire harness)
(2)HVAC Blower Motor Housing
(3)Wire Harness
(4)Powertrain Control Module (PCM) Bracket
Figure 9:

Fuel Supply System Flow


Object Number: 486504  Size: MF
(1)Fuel Injectors
(2)Fuel Rail
(3)Fuel Pressure Gage (J 34730-1)
(4)Fuel Pressure Gage Adapter (J 41041)
(5)Fuel Pressure Regulator
(6)Fuel Return Pipes/Hoses
(7)Fuel Pump
(8)Fuel Filter
(9)Fuel Feed Pipes/Hoses