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

Years 2003–04 Models 2 Factory citations 6

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Also documented for Buick GMC Oldsmobile

Documented applications

SSR (2003–2006)

2003–2004 Factory-verified

the 2003 kit guide names it the Vortec 5300 V8 with 300 hp; the 2005 and 2006 lists still print LM4, but the 2005 kit order guide (pages 90 and 99) shows only the LS2 as the engine, so 2005 and 2006 are not claimed ; the 2003-2004 lists print "Gas, 8 Cylinder" without a dash

GM Heritage factory kit — 2003 And 2004 Chevrolet SSR, p.88.
GM factory document — 2003 chevrolet ssr rpo code list, p.1.
GM factory document — 2004 chevrolet ssr rpo code list, p.1.

TrailBlazer — GMT360 (2002–2009)

2003, 2004 Factory-verified

GM Heritage factory kit — 2004 Chevrolet Trailblazer, p.33.
GM factory document — 2003 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet trailblazer 2wd rpo code list, p.1.

This page aggregates every documented appearance of LM4 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.