The 2006 GMC Sierra-1500 has overhead valves (OHV).
The 2006 GMC Canyon has double overhead cam (DOHC).
The 2006 GMC Yukon has overhead valves (OHV).
The 2006 GMC Savana has overhead valves (OHV).
The 2006 GMC Savana-Cargo has overhead valves (OHV).
The 2006 GMC Sierra-2500HD has overhead valves (OHV).
The 2006 GMC Yukon-XL has overhead valves (OHV).
The 2008 GMC Acadia has double overhead cam (DOHC).
The 2013 GMC Acadia has double overhead cam (DOHC).
The 2010 GMC Acadia has double overhead cam (DOHC).
The 2007 GMC Acadia has double overhead cam (DOHC).
The 2011 GMC Canyon has double overhead cam (DOHC).
The 2012 GMC Acadia has double overhead cam (DOHC).