How do you adjust timing on a 97 4.3 s10?

To adjust the timing on a 1997 Chevrolet S-10 with a 4.3L engine, first ensure the engine is at operating temperature and then disconnect the timing connector (usually a single wire) to enter base timing mode. Use a timing light to check the timing marks on the harmonic balancer against the specified timing specification found in the service manual, which is typically around 0 degrees BTDC for this engine. If adjustment is needed, loosen the distributor hold-down bolt and rotate the distributor slightly until the correct timing is achieved, then retighten the bolt and reconnect the timing connector. Always double-check the timing after adjustments to ensure accuracy.