305, 350 cubic inch 5.0L, 5.7L Vortec
Chevrolet introduced the Vortec 5000 and 5700 truck engines, the last of the Gen 1 SBC V8 in production vehicles. The Gen 1 SBC V8 is still being produced as an aftermarket crate engine, predominantly for performance applications. The Vortec engines had a seven year lifespan, last produced in 2002. The Vortec 5000 (305-5.0L), RPO L30, was replaced by the Gen 3 Vortec 4800 (293-4.8L), RPO LR4. The Vortec 5700 (350-5.7L), RPO L31, was replaced by the Gen 3 Vortec 5300 (325-5.3L), RPOs LM7, L59, LM4 and L33.