The 2005 GMC Yukon has 16 valves.
The 2005 GMC Savana has 12 valves.
The 2005 GMC Canyon has 16 valves.
The 2005 GMC Savana-Cargo has 12 valves.
The 2005 GMC Sierra-2500HD has 16 valves.
The 2005 GMC Yukon-XL has 16 valves.
The 2005 GMC Yukon has overhead valves (OHV).
The 2005 GMC Savana has overhead valves (OHV).
The 2005 GMC Savana-Cargo has overhead valves (OHV).
The 2005 GMC Sierra-1500 has overhead valves (OHV).
The 2005 GMC Yukon-XL has overhead valves (OHV).
The 2005 GMC Sierra-2500HD has overhead valves (OHV).