most likely you will have to drop the fuel tank because most fuel pumps are in the tank.
The 2003 Chevrolet Suburban runs on flex-fuel (FFV).
The 2010 Chevrolet Suburban runs on flex-fuel (FFV).
The 2004 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 2015 Chevrolet Suburban runs on flex-fuel (FFV).
The 2012 Chevrolet Suburban runs on flex-fuel (unleaded/E85).
The 2013 Chevrolet Suburban runs on flex-fuel (unleaded/E85).
The 2005 Chevrolet Suburban runs on flex-fuel (unleaded/E85).
The 2011 Chevrolet Suburban runs on flex-fuel (unleaded/E85).
The 2003 Chevrolet Suburban fuel filter is located inside of the gas tank. You will to remove the gas tank in order to change the fuel filter.
The 2008 Chevrolet Suburban runs on regular unleaded.