The camshaft position sensor (CMP sensor) on a 1997 Chevy K1500 with a 5.7L Vortec engine is located on the
passenger side (right side) of the engine, near the front of the engine block. It's typically mounted on the cylinder head, fairly close to where the distributor would be on older vehicles (though this engine is distributorless). You'll likely find it near the front timing cover.
It's a good idea to consult a repair manual specific to your year and engine for a precise location and picture. A Chilton's or Haynes manual would be helpful. You can also find diagrams online by searching "1997 Chevy K1500 5.7L camshaft position sensor location."
