Will a 1996 4L60E interchange with a 1999 4L60E?

Yes, a 1996 4L60E can interchange with a 1999 4L60E, but there are some considerations. The two transmissions may have differences in wiring harnesses, connectors, and electronic controls due to changes in technology over the years. It's important to verify compatibility with your specific vehicle and make any necessary adjustments or modifications to ensure proper operation.