Will a 93 Chevy lumina engine and transmission fit 96 lumina?

While both are Lumina's, a direct swap of the engine and transmission from a 1993 to a 1996 model isn't guaranteed to be plug-and-play. There were changes made to the Lumina platform between 1993 and 1996, though not necessarily huge ones.

The biggest hurdles you might face are:

* Engine Mounts: The engine mounts might be different, requiring modification or replacement.

* Transmission Mounts: Similar to the engine, transmission mounts could be incompatible.

* Wiring Harness: The wiring harness connectors might not match perfectly. You might need to do some splicing or re-pinning.

* Computer/ECU: The engine control unit (ECU) from the 1993 model might not be compatible with the 1996 car's systems. This is a major potential problem.

* Exhaust System: The exhaust might not line up perfectly.

In short: It's *possible* but not *certain*. You'd need to do a thorough comparison of the engine bay components, wiring diagrams, and possibly even physically compare the parts before attempting the swap. A mechanic familiar with these models would be able to give you a much better assessment based on the specific engine and transmission codes.