The 2012 GMC Savana-Cargo has 12 valves.
The 2012 GMC Yukon has 16 valves.
The 2012 GMC Canyon has 16 valves.
The 2012 GMC Savana has 16 valves.
The 2012 GMC Terrain has 16 valves.
The 2012 GMC Acadia has 24 valves.
The 2012 GMC Yukon-XL has 16 valves.
The 2012 GMC Sierra-2500HD has 16 valves.
The 2012 GMC Sierra-3500HD has 16 valves.
The 2012 GMC Yukon-Hybrid has 16 valves.
The 2012 GMC Sierra-1500 has 12 valves.
The 2012 GMC Sierra-1500-Hybrid has 16 valves.
The 2012 GMC Yukon has overhead valves (OHV).