CTS — Sigma II (2008–2015) → 2009 ✓ Factory-verified internal ⛭ GM factory document — 2009 cadillac cts rpo code list, p.1.
DTS — G-body (2006–2011) → 2009 ✓ Factory-verified internal ⛭ GM factory document — 2009 cadillac dts rpo code list, p.1.
STS — Sigma (2005–2011) → 2009 ✓ Factory-verified internal ⛭ GM factory document — 2009 cadillac sts rpo code list, p.1.
XLR — Y-body (2004–2009) → 2009 ✓ Factory-verified internal ⛭ GM factory document — 2009 cadillac xlr rpo code list, p.1.