GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Avalanche - 4WD 🢒 Engine 🢒 Engine Controls - 8.1L 🢒 Engine Controls Component Views
Figure 1:

Powertrain Control Module (PCM)
Object Number: 750139 Size: LF
(1)Powertrain Control Module (PCM)
(2)PCM Connector C1 and C2
Figure 2:

Evaporative Emission (EVAP) Canister Purge Solenoid
Object Number: 750142 Size: LF
(1)Evaporative Emission (EVAP) Canister Purge Solenoid
Figure 3:

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2


Object Number: 750144 Size: LF
(1)Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2
Figure 4:

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
Object Number: 750146 Size: LF
(1)Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
Figure 5:

Park/Neutral Position (PNP) Switch
Object Number: 750148 Size: LF
(1)Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
(2)Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
(3)Vehicle Speed Sensor (VSS)
(4)Park/Neutral Position (PNP) Switch Connectors C1 and C2
(5)Park/Neutral Position (PNP) Switch
(6)Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2
Figure 6:

Crankshaft Position (CKP) Sensor
Object Number: 750152 Size: LF
(1)Exhaust Gas Recirculation (EGR) Connector
(2)Exhaust Gas Recirculation (EGR) Valve
(3)Crankshaft Position (CKP) Sensor Connector
(4)Crankshaft Position (CKP) Sensor
(5)Engine Oil Pressure (EOP) Sensor
(6)Engine Oil Pressure (EOP) Sensor Connector
Figure 7:

Fuel Pump Relay - Secondary - w/Dual Tanks
Object Number: 750178 Size: LF
(1)Fuel Pump Relay - Secondary
Figure 8:

Chassis Mounted Fuel/EVAP Controls - 20 Series
Object Number: 1606460 Size: LF
(1)Fuel Pump and Sender Assembly
(2)Evaporative Emissions (EVAP) Canister Vent Solenoid
Figure 9:

Throttle Actuator Control (TAC) Module
Object Number: 750162 Size: LF
(1)Throttle Actuator Control (TAC) Module
(2)Throttle Actuator Control (TAC) Connector
(3)Fuse Block - Underhood
Figure 10:

Right Front of Engine Compartment
Object Number: 350034 Size: MF
(1)Clamp
(2)Air Duct
(3)Clamp
(4)Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor
(5)Air Cleaner Assembly
(6)Air Restriction Indicator
Figure 11:

Engine View-Upper Left
Object Number: 750165 Size: LF
(1)Engine
(2)Injector Connector
(3)Ignition Coil
(4)Ignition Coil Connector
(5)Throttle Position (TP) Sensor Connector
(6)Throttle Actuator Control (TAC) Motor Connector
(7)Evaporative Emissions (EVAP) Canister Purge Solenoid Connector
(8)Generator Connector
Figure 12:

Camshaft Position (CMP) Sensor
Object Number: 750166 Size: LF
(1)Engine
(2)Camshaft Position (CMP) Sensor
(3)Camshaft Position (CMP) Sensor Connector
Figure 13:

Engine View-Upper Right
Object Number: 750169 Size: LF
(1)Engine Harness
(2)Manifold Absolute Pressure (MAP) Sensor
(3)Manifold Absolute Pressure (MAP) Sensor Connector
(4)Engine
(5)Ignition Coil Connector (Engine Side)
(6)Throttle Actuator Control (TAC) Motor
(7)Ignition Coil Connector (Harness Side)
(8)Engine Coolant Temperature (ECT) Sensor Connector
(9)Ignition Coil
Figure 14:

Engine View-Lower Right
Object Number: 750172 Size: LF
(1)A/C Compressor Clutch
(2)A/C Compressor Clutch Connector
(3)Engine Wiring Harness
(4)Engine Oil Level Sensor Connector
(5)Knock Sensor (KS) 2 Connector
(6)Knock Sensor (KS) 2
(7)Starter Relay Output (S-Terminal Feed)
Figure 15:

Engine View-Lower Left
Object Number: 750174 Size: LF
(1)Engine
(2)Knock Sensor (KS)-1
(3)Knock Sensor (KS)-1 Connector
(4)Engine Harness
(5)Engine Harness Ground
Figure 16:

Accelerator Pedal Position (APP) Sensor Connector
Object Number: 751380 Size: MF
(1)Accelerator Pedal Position (APP) Sensor Connector
(2)Accelerator Pedal Position (APP) Sensor