Chevrolet Repair: 93 1500 timing, engine wiring harness, automatic transmissions

Question
93 1500 silverado 4x4 auto with air....Need timing spec and procedure...Thanx

Answer
Base Timing, with Manual and Automatic Transmissions: 0°(TDC)

disconnect the timing connector that breaks out of the engine wiring harness conduit adjacent to the distributer. It is a single wire sealed connector that has a tan with black stripe lead.