GM Gen 5 V8

This is an engine specification guide for General Motors’ fifth-generation L83 and L8B engines that launched in 2014. These LT-based engines are commonly referred to as EcoTec3 5.3L engines. They are all-aluminum small blocks, both of which incorporate Active Fuel Management (AFM), Variable Valve Timing (VVT), and are flex-fuel capable (E85). The engines also use