LP1 ✓ Factory-verified

Cadillac · Regular Production Option

Engine, gas, 6 cylinder, 2.8L, sequential fuel injection, V6, DOHC, aluminum, 60 degrees, GM

Years 2005–09 Models 2 Factory citations 4

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Documented applications

CTS — Sigma / GMX320 (2003–2007) →

• 2005–2007 ✓ Factory-verified

  The 2005 list adds high output to the wording.

  ⛭ GM factory document — 2005 cadillac cts rpo code list, p.1.

  ⛭ GM factory document — 2007 cadillac cts rpo code list, p.1.

STS — Sigma (2005–2011) →

• 2007–2009 ✓ Factory-verified
  ⛭ GM factory document — 2007 cadillac sts rpo code list, p.1.

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

This page aggregates every documented appearance of LP1 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.