The crankshaft position sensor (CKP sensor) on a 2001 Silverado 5.3L is located on the passenger side of the engine block, near the front of the engine,
below the crankshaft pulley. You'll likely need to get under the truck or use a mirror to see it clearly. It's a relatively small sensor with a single wire connector.
It's important to note that the exact location might vary slightly depending on the specific engine configuration, but it's consistently found in that general area. A repair manual specific to your year and model Silverado will give you the most precise location with diagrams.
