Where is the Air intake sensor on a 1998 GMC truck?

The exact location of the air intake sensor (more accurately called the Mass Airflow Sensor or MAF sensor) on a 1998 GMC truck depends on the engine type. There's no single answer.

To find it, you'll need to:

1. Identify your engine: Look for an engine code (like 4.3L Vortec V6, 5.7L Vortec V8, etc.) on a sticker under the hood or in your owner's manual.

2. Consult a repair manual: A repair manual specific to your truck's year, make, model, and engine will show you a diagram with the MAF sensor's location. You can find these online (often as PDFs) or at auto parts stores.

3. Search online with your specific engine code: Searching for "[Your Engine Code] 1998 GMC MAF Sensor Location" on Google or YouTube might yield images and videos showing exactly where it is on your specific truck.

Generally, the MAF sensor is located in the air intake tube, between the air filter housing and the throttle body. It's usually a rectangular housing with a wire harness connected. It will be near the air filter box but not directly on it.

Be cautious: The MAF sensor is a delicate component. Avoid touching the sensor element inside the housing. Oil or dirt on the sensor can cause inaccurate readings and engine problems.