General Motors began development of an updated Lumina in 1989, under chief engineer Norm Sholler, planned for a late 1992 launch. By 1991, a final body design was approved. Development eventually took longer than planned, delaying launch by 18 months. The redesigned Lumina was unveiled at the Los Angeles Auto Show in January 1994 as a 1995 model. The 1995 Lumina received a rounded body, increasing its size, as well as an updated interior. Unlike its other W platform counterparts, the Lumina retained the first-generation chassis. Replacing the Lumina two-door coupe was the resurrected Monte Carlo. The LH0 V6 was dropped in favor of the L82 V6, known as the 3100 SFI; the latter engine produced 20 more horsepower from the same displacement due to a revised intake manifold and cylinder heads.