They have relocated the fuel filter in the Avalanches. They are now inside the fuel tank and built into the fuel pump.
FlexFuel will be written on the vehicle somewhere if that vehicle is Flex Fuel.
The 2013 Chevrolet Black-Diamond-Avalanche runs on flex-fuel (FFV).
Two 5.3 liter engines (LM7 or L59, the latter being a flex fuel engine) and one 8.1 liter engine
passenger side under the flex air filter connecting hose
no, flex fuel is 2005 and up gm models
The 2013 RAM 1500 runs on flex-fuel (unleaded/E85).
The 2014 RAM 1500 runs on flex-fuel (unleaded/E85).
The 2014 GMC Sierra-1500 runs on flex-fuel (FFV).
The 2014 Chevrolet Silverado-1500 runs on flex-fuel (FFV).
The 2010 Chevrolet Silverado-1500-Hybrid runs on flex-fuel (unleaded/E85).
According to the Owner Guide and fordparts.com : Motorcraft FG-991 , is the fuel filter required for a 1999 Ford Ranger 3.0 liter flex fuel engine
Fuel filter is located as a part of fuel pump. You would have to remove fuel tank of the mountings assembley then you see flex fuel lines coming of the fuel pump.Once you disconect flex fuel lines (quick conectors) Unscrew the fuel pump then you see a filter