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How to Replace the Air Mass Sensor on a GM
- 1). Turn off the ignition and place the vehicle in park (automatic transmission) or first gear (manual transmission). Engage the parking brake and open the hood. Disconnect the negative cable from the battery terminal using the battery terminal wrench.
- 2). Locate the MAF sensor. Start at the beginning of the air intake tube near the air filter box and follow the tube towards the engine. The MAF is located approximately halfway between the air filter box and the engine. The MAF sensor is the same diameter as the intake tube, and it has an electrical connector plugged into it.
- 3). Disconnect the MAF sensor's electrical connector. Loosen the air intake tube clamps on each side of the MAF sensor using a flat-head screwdriver. Remove both air intake tube ends from the MAF sensor and discard the faulty sensor.
- 4). Attach the air intake tube ends to the new MAF sensor by tightening the clamps with a flat-head screwdriver. Attach the electrical connector to the MAF sensor.
- 5). Reconnect the negative cable to the battery. Close the hood.
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