3.5 cu. in. (57 cc)
The XL-12 is about 54cc's while the Super XL 12 was about 58cc's.
The 2010 GMC Yukon-XL has a 5.3 L base engine size.
The 2012 GMC Yukon-XL has a 5.3 L base engine size.
The 2003 GMC Yukon-XL has a 5.3 L base engine size.
The 2007 GMC Yukon-XL has a 5.3 L base engine size.
The 2005 GMC Yukon-XL has a 5.3 L base engine size.
The 2006 GMC Yukon-XL has a 5.3 L base engine size.
The 2009 GMC Yukon-XL has a 5.3 L base engine size.
The 2011 GMC Yukon-XL has a 5.3 L base engine size.
The 2008 GMC Yukon-XL has a 5.3 L base engine size.
The 2004 GMC Yukon-XL has a 5.3 L base engine size.
The 2014 GMC Yukon-XL has a 5.3 L base engine size.