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Sensors for 2001 GMC C3500HD

Part # / Description / Price
Ignition Knock (Detonation) Sensor
GM GM

All models. 8.1l. Express, savana. 8.1l. Sends signals to the engine control module (ECM) to adjust timing Helps prevent damage to the engine caused by pre-ignition

Mass Airflow Sensor with Intake Air Temperature Sensor
GM GM

Mass Air Flow Sensor

Measures the amount of air entering the engine so the ECM can determine the amount of fuel to inject This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors