1996 GMC G3500 Engine: 5.7L V8 CNG; EngineVIN: K; FuelSystem: TBI; Electronic;. 1996 GMC G3500 Engine: 5.7L V8 GAS; EngineVIN: K; FuelSystem: TBI; Electronic;. 1996 GMC G3500 Engine: 7.4L V8 GAS; EngineCode: L19; EngineVIN: N; FuelSystem: TBI; Electronic;.
