yes it will fit
The 99 Buick Century 231 engine will fit into a 96 Chevy lumina with a little fabrication.
Yes. But they use different wire harnesses and ECM's. The 93 has less electronics than the 96 year Lumina's.
No, the compressors and mounting points are different on the 95 Lumina
yes if its the not the DOHC from the Lumina Z34
No, there is no information suggests that a 1996 Buick Century 231 will fit into a 1999 Chevy Lumina.
Yes
how do you change the radiator in 96 chevrolet lumina
yes as long as it is the same size 3.1 or so on and you will have to change the one exhaust manifold i know that for sure because i just put a 96 3.1 liter into a 97 lumina.
yes
On my 96' Lumina and most modern GM vehicles, (maybe not all) the startersolenoid is attached to the starter by two screws. Simply follow your positive battery cable and it will lead you directly to it. However, I know that there are some that come as one unit. Just call a local parts store like Checker or Autozone.
With a hammer and a cold chisel.