Where do you find electronic spark timing bypass connector on a 1997 Chevy silverado 1500 5.7l?

There isn't a readily accessible, single "electronic spark timing bypass connector" on a 1997 Chevy Silverado 1500 5.7L (or any OBD-II vehicle for that matter). The spark timing is controlled by the PCM (Powertrain Control Module) via signals to the ignition system. There's no simple connector to bypass this electronically.

Attempts to bypass the spark timing directly would involve significant modifications and are strongly discouraged. Doing so could severely damage the engine.

If you're having issues with the ignition timing, the problem is likely within the:

* PCM: The computer itself might be faulty.

* Crankshaft Position Sensor (CKP): A faulty CKP sensor prevents the PCM from accurately determining engine speed and timing.

* Camshaft Position Sensor (CMP): Similar to the CKP, a faulty CMP sensor will affect timing.

* Ignition Control Module (ICM) or Coil: These components can also lead to mistiming.

* Wiring: Damaged or corroded wiring in the ignition system.

Instead of looking for a bypass, diagnose the root cause of the timing issue using a scan tool capable of reading OBD-II codes and monitoring live data. A mechanic with experience in OBD-II systems can properly diagnose and repair any timing-related problems.