Fig 1: MAP, IAC, ECT, TP Sensors Component View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Manifold Absolute Pressure (MAP) Sensor
2	Idle Air Control (IAC) Valve
3	Engine Coolant Temperature (ECT) Sensor
4	Throttle Position (TP) Sensor

Fig 2: EVAP Purge Solenoid, and EGR Valve Component View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Evaporative Emissions (EVAP) Canister Purge Solenoid
2	Exhaust Gas Recirculation (EGR) Valve

Fig 3: CKP B, CKP A, Engine Oil Pressure Switch, and Engine Oil Level Switch Component View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Crankshaft Position Sensor (CKP) Sensor B
2	Crankshaft Position Sensor (CKP) Sensor A
3	Engine Oil Pressure (EOP) Switch
4	Engine Oil Level Switch

Fig 4: Engine Compartment, Top of Engine Component View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	C139 (C140 Similar)
2	Ignition Coil/Module 8 (7 similar)
3	Ignition Coil/Module 6 (5 similar)
4	Ignition Coil/Module 4 (3 similar)
5	Ignition Coil/Module 2 (1 similar)

Fig 5: CMP, VSS, and HO2S Bank 1 Sensor 1 Component View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Camshaft Position (CMP) Sensor
2	Vehicle Speed Sensor (VSS)
3	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1

Fig 6: Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 (Post HO2) Component View

Courtesy of GENERAL MOTORS CORP.

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