Engine, Ecotec 2.4L DOHC 4-cylinder, direct injection, eAssist

Years 2012–16 Models 2 Factory citations 2

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Also documented for Chevrolet

Documented applications

LaCrosse — Epsilon II, 2nd gen (2010–2016)

2012, 2015–2016 Factory-verified

2015: 1SB, 1SL FWD: S; 182 hp; with MHH, FXJ, KY2, TM7, NWN, J60, RDL wheels, RA9 tires and VRI; new for 2012 (GM Authority 2012 RPO list); 2016: optional on 1SB and 1SL (GM Authority 2016 changes)

GM factory document — 2015 buick lacrosse fleet order guide wayback, p.4.

Regal — Epsilon II, 5th gen (2011–2017)

2012, 2014, 2016 Factory-verified

new for 2012, with MHH, FXJ, KY2, TM7, Q05 wheels and RAF tires (GM's 2012 list); available on 1SN only, FWD or AWD (GM's 2014 list); 2016: 1SN: O; FWD only; with MHH, FXJ, KY2, TM7, RSB wheels and RAF tires; 1SN requires a fleet or government order type

GM factory document — 2016 buick regal order guide copy gm authority, p.12, p.25.
2013 Single-source

standard on the 4GR69 models (GM Authority 2013 changes); single-source: GM Authority 2013 changes does not credit GM

This page aggregates every documented appearance of LUK in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.