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

Underhood Relays


Object Number: 234640  Size: MF
(1)Starter Relay
(2)Fuel Pump Relay
(3)Air Conditioning Relay
(4)VCM Connector C4 (Black)
(5)VCM Connector C2 (Red)
(6)Vehicle Control Module (VCM)
(7)VCM Connector C1 (Blue)
(8)VCM Connector C3 (Clear)
Figure 2:

VCM


Object Number: 234629  Size: MF
(1)Vehicle Control Module (VCM)
Figure 3:

Vehicle Speed Sensor (2WD)


Object Number: 209622  Size: SF
(1)Vehicle Speed Sensor (VSS)
Figure 4:

HO2 Sensors


Object Number: 234624  Size: SF
(1)Heated Oxygen (HO2) Sensor Bank 2 Sensor 1
(2)Heated Oxygen (HO2) Sensor Bank 1 Sensor 2
(3)Heated Oxygen (HO2) Sensor Bank 2 Sensor 2
(4)Heated Oxygen (HO2) Sensor Bank 1 Sensor 1
Figure 5:

Fuel Tank and Sender


Object Number: 234991  Size: MF
(1)Fuel Tank
(2)Fuel Pump And Sender Assembly
Figure 6:

Purge Solenoid, Ignition Coil, Oil Pressure/Fuel Pump Switch and CMP


Object Number: 209635  Size: MF
(1)EVAP Canister Purge Solenoid
(2)Ignition Control Module
(3)Ignition Coil
(4)Oil Pressure Switch
(5)Camshaft Position Sensor (CMP)
Figure 7:

Knock Sensor and CKP


Object Number: 209638  Size: SF
(1)Knock Sensor (KS)
(2)Crankshaft Position (CKP) Sensor
Figure 8:

TP, IAC and PCV


Object Number: 209640  Size: SF
(1)Idle Air Control (IAC) Valve
(2)Positive Crankcase Ventilation (PCV) Valve
(3)Throttle Position (TP) Sensor
Figure 9:

MAP, EGR, Purge Solenoid, and Throttle Body


Object Number: 209643  Size: SF
(1)Throttle Body
(2)Exhaust Gas Recirculation (EGR) Valve
(3)Generator
(4)Evaporative Emission (EVAP) Canister Purge Valve
(5)Manifold Absolute Pressure (MAP) Sensor
Figure 10:

ECT and EGR


Object Number: 217936  Size: SF
(1)Exhaust Gas Recirculation (EGR) Valve
(2)Engine Coolant Temperature (ECT) Sensor
Figure 11:

MAF and IAT Sensors


Object Number: 234576  Size: MF
(1)Mass Air Flow (MAF) Sensor
(2)Intake Air Temperature (IAT) Sensor
(3)Air Cleaner Assembly
Figure 12:

EVAP Canister and Vent Valve (Enhanced)


Object Number: 235125  Size: MF
(1)EVAP Vent Valve (Enhanced type)
(2)EVAP Canister
(3)EVAP Canister
Figure 13:

EVAP Canister and Water Separator (Non-Enhanced)


Object Number: 235128  Size: MF
(1)EVAP Canister Water Separator (Non-Enhanced type)
(2)EVAP Canister
(3)EVAP Canister
Figure 14:

Purge and EVAP Service Port and Oil Pressure Switch


Object Number: 234631  Size: SF
(1)EVAP Canister Purge Solenoid
(2)EVAP System Service Port
(3)Oil Pressure Sending Unit/Fuel Pump Switch
Figure 15:

Automatic Transmission, Upper LH Rear


Object Number: 180082  Size: MF
(1)Transmission Input Speed Sensor
(2)Transmission Output Speed Sensor
(3)C301
(4)C2
(5)C1
(6)Park/Neutral Position (PNP) and Backup Lamps Switch