The 2011 GMC Terrain has double overhead cam (DOHC).
The 2013 GMC Terrain has double overhead cam (DOHC).
The 2010 GMC Terrain has double overhead cam (DOHC).
The 2012 GMC Terrain has double overhead cam (DOHC).
The 2014 GMC Terrain has double overhead cam (DOHC).
The 2011 GMC Canyon has double overhead cam (DOHC).
The 2011 GMC Acadia has double overhead cam (DOHC).
The 2011 GMC Yukon has overhead valves (OHV).
The 2011 GMC Savana has overhead valves (OHV).
The 2011 GMC Savana-Cargo has overhead valves (OHV).
The 2011 GMC Sierra-3500HD has overhead valves (OHV).
The 2011 GMC Sierra-2500HD has overhead valves (OHV).
The 2011 GMC Sierra-1500 has overhead valves (OHV).