The Gen-V 5.3L L83 engine delivers a combination of advanced technologies, including Direct Injection, Active Fuel Management (cylinder deactivation), and dual-equal camshaft phasing (Variable Valve Timing) that support an advanced combustion system.

Structurally, the Gen-V small-block is similar to the Gen III/IV engines, including the use of a deep-skirt cylinder block. Refinements and new or revised components are used throughout, including a revised cooling system and all-new cylinder heads. The engine is also designed to accommodate an engine-driven, high-pressure fuel pump for the direct-injection system.

5.3L L83 Features & Specifications

5.3L L83 Tech Specs
Type 5.3L Gen V V-8 Small Block
Displacement 5328cc
Engine Orientation Longitudinal
Compression Ratio 11.0:1
Valve Configuration Overhead valves
Valves per Cylinder 2
Assembly Sites Tonawanda, NY, Ramos, Mexico, and St. Catharine’s, Ontario
Valve Lifters Hydraulic roller
Firing Order 1 – 8 – 7 – 2 – 6 – 5 – 4 – 3
Bore x Stroke 96.01 x 92 mm
Fuel System SIDI
Fuel Type Regular unleaded and E85
Maximum Engine Speed 5800 rpm
Emissions Controls Catalytic converter, three-way catalyst, positive crankcase ventilation
Horsepower 355 hp (264 kW) @ 5600 rpm*
Torque 382 lb-ft ( 519 Nm ) @ 4100 rpm*
Block Cast aluminum
Cylinder Head Cast aluminum
Intake Manifold Composite
Exhaust Manifold Cast nodular iron
Main Bearing Caps Powder metal
Crankshaft Cast nodular iron
Camshaft Billet steel
Connecting Rods Forged powder metal