Fig 1: Powertrain Control Module (PCM) Location View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Engine Harness
2	Battery
3	S154
4	Powertrain Control Module (PCM) Connector C1
5	Powertrain Control Module (PCM) Connector C2
6	Powertrain Control Module (PCM)
7	Fuel Pump Prime

Fig 2: MAF, IAT, & Air Cleaner Assembly Location View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Intake Air Temperature (IAT) Sensor
2	Mass Air Flow (MAF) Sensor
3	Air Cleaner Assembly

Fig 3: Crankshaft Position (CKP) Sensor Location View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Crankshaft
2	Front Engine Cover
3	Crankshaft Position (CKP) Sensor

Fig 4: Throttle Position (TP) Sensor, Idle Air Control (IAC) Valve, & Camshaft Position (CMP) Sensor Location View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Throttle Position (TP) Sensor
2	Idle Air Control (IAC) Valve
3	Ignition Coil
4	Evaporative Emission (EVAP) Canister Purge Solenoid
5	Engine Oil Pressure (EOP) Sensor
6	Knock Sensor (KS)
7	Camshaft Position (CMP) Sensor
8	Fuel Pressure Connection Valve

Fig 5: MAP, Purge Solenoid, & Throttle Body Location View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Throttle Body
2	Generator
3	Evaporative Emission (EVAP) Canister Purge Solenoid
4	Manifold Absolute Pressure (MAP) Sensor

Fig 6: Engine Coolant Temperature (ECT) Sensor Location View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Bank 1 Cylinder Head
2	Engine Coolant Temperature (ECT) Sensor

Fig 7: Engine Wiring, Right Side Location View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	S123
2	Evaporative Emission (EVAP) Canister Purge Solenoid Connector
3	Ignition Coil Connector
4	Ignition Control Module (ICM)
5	S154
6	S119
7	Ignition Control Module (ICM) Connector
8	Generator
9	Generator Connector
10	Ignition Coil
11	Manifold Absolute Pressure (MAP) Sensor Connector
12	Manifold Absolute Pressure (MAP) Sensor
13	Evaporative Emission (EVAP) Canister Purge Solenoid

Fig 8: Heated Oxygen Sensors Location View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
2	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
3	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1

Fig 9: Vehicle Speed Sensor (VSS) (2WD w/A/T) Location View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Vehicle Speed Sensor (VSS)

Fig 10: A4WD Transfer Case Locator View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Propshaft Speed Sensor - Rear Connector
2	Transfer Case Encoder Motor Connector
3	Vehicle Speed Sensor (VSS) Connector
4	Propshaft Speed Sensor - Front Connector
5	Transfer Case
6	P301

Fig 11: Evaporative Emission (EVAP) Canister Vent Solenoid Location View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Left Hand Frame Rail
2	Fuel Filter
3	Evaporative Emission (EVAP) Canister Vent Solenoid

Fig 12: Fuel Tank, Fuel Tank Pressure (FTP) Sensor, & Fuel Sender Location View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Fuel Tank
2	Fuel Pump and Sender Assembly
3	Fuel Tank Pressure (FTP) Sensor Connector
4	Fuel Pump and Sender Assembly Connector
5	Left Hand Frame Rail

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Engine Controls Component Views