Will camshaft sensor keep 1996 Chevy truck from starting?

Yes, a faulty camshaft position sensor (CMP sensor) can absolutely prevent a 1996 Chevy truck from starting. The CMP sensor tells the computer the position of the camshaft, which is crucial for proper ignition timing and fuel injection. Without this information, the engine control module (ECM) can't accurately control the engine's operation, resulting in a no-start condition.