It is located next to the driveshaft that goes from the front differential to the transfer case (on a 4wd obviously). Specifically, it is just in front of the transfer case, on the drivers side of the driveshaft, mounted on a bracket on the frame. I found mine by going to the library and accessing the online automotive service manuals, which have more information than my Haynes service manual. This same online manual has a removal and installation procedure.
on back of engine behind the flex plate.
The passenger side front cylinder is #2 The drivers side front Cylinder is #1
The 2003 Chevrolet Suburban runs on flex-fuel (FFV).
The 2014 Chevrolet Suburban runs on flex-fuel (FFV).
The 2006 Chevrolet Suburban runs on flex-fuel (FFV).
The 2004 Chevrolet Suburban runs on flex-fuel (FFV).
The 2015 Chevrolet Suburban runs on flex-fuel (FFV).
The 2010 Chevrolet Suburban runs on flex-fuel (FFV).
The 2005 Chevrolet Suburban runs on flex-fuel (unleaded/E85).
The 2011 Chevrolet Suburban runs on flex-fuel (unleaded/E85).
The 2013 Chevrolet Suburban runs on flex-fuel (unleaded/E85).
The 2012 Chevrolet Suburban runs on flex-fuel (unleaded/E85).