LS4 ✓ Factory-verified

Buick · Regular Production Option

Engine, gas, 8 cylinder, 5.3L, sequential fuel injection, aluminum, cylinder deactivation, GM

Years 2008 Models 1 Factory citations 1

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Also documented for ChevroletPontiac

Documented applications

LaCrosse — W-body / GMX365 (2005–2009) →

• 2008 ✓ Factory-verified

  5.3 L V8 of the LaCrosse Super (Wikipedia); the 2009 list does not print LS4.

  ⛭ GM factory document — 2008 buick lacrosse rpo code list, p.1.

This page aggregates every documented appearance of LS4 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.