1996 GMC P3500 Engine: 4.3L V6 GAS; EngineCode: L35; EngineVIN: W; FuelSystem: MFI; Electronic;. 1996 GMC P3500 Engine: 5.7L V8 GAS; EngineCode: L31; EngineVIN: R; FuelSystem: MFI; Electronic;. 1996 GMC P3500 Engine: 7.4L V8 GAS; EngineCode: L19; EngineVIN: N; FuelSystem: TBI; Electronic;.
