The 2012 GMC Sierra-2500HD has overhead valves (OHV).
The 2012 GMC Acadia has double overhead cam (DOHC).
The 2012 GMC Canyon has double overhead cam (DOHC).
The 2012 GMC Terrain has double overhead cam (DOHC).
The 2012 GMC Yukon has overhead valves (OHV).
The 2012 GMC Savana has overhead valves (OHV).
The 2012 GMC Savana-Cargo has overhead valves (OHV).
The 2012 GMC Yukon-XL has overhead valves (OHV).
The 2012 GMC Sierra-3500HD has overhead valves (OHV).
The 2012 GMC Yukon-Hybrid has overhead valves (OHV).
The 2012 GMC Sierra-1500 has overhead valves (OHV).
The 2012 GMC Sierra-1500-Hybrid has overhead valves (OHV).
The 2008 GMC Acadia has double overhead cam (DOHC).