The 2005 GMC Yukon-XL has 16 valves.
The 2005 GMC Yukon has overhead valves (OHV).
The 2005 GMC Yukon-XL has overhead valves (OHV).
The 2001 GMC Yukon has 16 valves.
The 2004 GMC Yukon has 16 valves.
The 2012 GMC Yukon has 16 valves.
The 2015 GMC Yukon has 16 valves.
The 2003 GMC Yukon has 16 valves.
The 2002 GMC Yukon has 16 valves.
The 2010 GMC Yukon has 16 valves.
The 2013 GMC Yukon has 16 valves.
The 2011 GMC Yukon has 16 valves.