On a 2002 Chevy Tahoe with the 5.3L engine, the crankshaft position sensor (CKP sensor) is located on the passenger side of the engine block, near the front of the engine. It's typically mounted on the engine block itself, close to the crankshaft pulley. You'll likely need to get under the vehicle for a clear view.
Important Note: While the general location is consistent, it's always best to consult a repair manual specific to your vehicle's year and engine. A diagram will give you the precise location and help you avoid confusion with other sensors in the vicinity. The Haynes and Chilton manuals are good options.
