Engine, gas, 8 cylinder, 4.6L, sequential fuel injection, V8, DOHC, high output, aluminum, GM

Years 2004–09 Models 3 Factory citations 7

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Documented applications

SRX — Sigma / GMT265 (2004–2009)

2004–2009 Factory-verified

GM factory document — 2004 cadillac srx rpo code list, p.1.
GM factory document — 2009 cadillac srx rpo code list, p.1.
GM factory document — 2007 cadillac srx rpo code list, p.1.

STS — Sigma (2005–2011)

2005–2009 Factory-verified

The 2009 list prints "ALUM" and a hyphen after "Engine".

GM factory document — 2005 cadillac sts rpo code list, p.1.
GM factory document — 2009 cadillac sts rpo code list, p.1.

XLR — Y-body (2004–2009)

2004–2009 Factory-verified

The 2004 list prints "VI" for V8. Wikipedia names a 4.6L Northstar V8 as the standard engine.

GM factory document — 2004 cadillac xlr rpo code list, p.1.
GM factory document — 2009 cadillac xlr rpo code list, p.1.

This page aggregates every documented appearance of LH2 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.