The camshaft position sensor (CMP sensor) on a 2002 Chevy Tahoe 5.3L is located on the
passenger side of the engine, near the front of the cylinder head. It's typically mounted on the cylinder head itself, fairly close to the camshaft sprocket. You'll likely need to look carefully; it's a relatively small sensor.
A repair manual or online diagrams specific to your year and engine are highly recommended for precise location and removal instructions. Pictures from online sources such as YouTube videos focusing on this specific sensor replacement are also extremely helpful.
