Based on a new generation of large-displacement four-cylinder engines that was designed for greater efficiency, GM proprietary Computational Fluid Dynamics (CFD) analysis techniques were used to develop an all-new combustion system with a higher compression ratio.

The new combustion system features improved knock resistance and higher-flowing intake and exhaust ports in the cylinder head. The 2.5L also features a high-pressure direct-injection fuel system, dual overhead camshafts with continuously Variable Valve Timing, electronic throttle control, and pistons with jet-spray oil cooling. All features coalesce to enhance efficiency, performance, emissions, and drivability.

2.5L LCV Features & Specifications

2.5L LCV Tech Specs
Type: 2.5L I-4
Displacement: 2457 cc
Engine Orientation: Longitudinal and transverse
Compression Ratio: 11.3:1
Valve Configuration: Dual overhead camshafts
Valves per Cylinder: 4
Assembly Sites: Tonawanda, NY
Valve Lifters: Hydraulic roller finger follower
Firing Order: 1 – 3 – 4 – 2
Bore x Stroke: 88.00 x 101.00 mm
Fuel System: DI
Fuel Type: Regular unleaded
Horsepower: 200 hp (149 kW) @ 6300 rpm*
Torque: 191 lb-ft (259 Nm) @ 4400 rpm*
Maximum Engine Speed: 6850 rpm
Emissions Control: Evaporative system, catalytic converters (close coupled and underfloor), positive crankcase ventilation
Block: Cast aluminum
Cylinder Head: Cast aluminum
Intake Manifold: Composite
Exhaust Manifold: High silicon molybdenum, cast nodular iron
Main Bearing Caps: Iron inserts cast into bedplate
Crankshaft: Steel
Camshaft: Assembled steel
Connecting Rod: Forged powdered metal