This document provides specifications for various General Motors LS engine codes used between 1997-2017. It lists the engine code, model years offered, horsepower and torque outputs, displacement, fuel type, bore and stroke dimensions, compression ratio, block material, and block features for the LS1, LS2, and LS3 engines. The LS1 was produced from 1997-2005 and made between 305-350 horsepower. The LS2 was made between 2005-2009 and produced 390-400 horsepower. The LS3 was produced from 2008-2017 and generated 426-436 horsepower.

1. Engine code
(VIN code) Gen III/IV/V Years offered Power (hp) Torque (lb.-ft.) Size (L) Fuel type Bore (in) Stroke (in)
Compression
ratio Block & heads Block features
LS1 (G) III 1997-05 305-350 @ 5600 350-365 @ 4400 5.7 91 3.9 3.62 10.25:1 Aluminum
LS2 (U) IV 2005–07,09 390-400 @ 6000 400 @ 4400 6 93 4 3.62 10.9:1 Aluminum
LS3 (W) IV 2008-17 426-436 @ 5900 420-428 @ 4600 6.2 93rec 4.06 3.62 10.7:1 Aluminum/Alum. heads
sodium exhaust valves