Sierra — GMT900 (2007–2013) → 2009 ✓ Factory-verified internal ⛭ GM factory document — 2009 gmc sierra 2wd rpo code list, p.1.
Yukon — GMT900 (2007–2014) → 2007–2009 ✓ Factory-verified internal ⛭ GM factory document — 2007 gmc yukon 2wd rpo code list, p.1. ⛭ GM factory document — 2009 gmc yukon 2wd rpo code list, p.1.