I WANT TO KNOW WHERE IS THE FUEL FILTER IN A CHEVY SILVERADO 4WD 2005?.
AND IF CAN I REPLACE OR IS IT LIFETIME?

 

Many of the 2005 trucks came equipped with in-tank fuel filters that cannot be serviced.
Check to make sure that you don't have a replaceable filter though, if your truck is equipped with such it will be located on the inside of the frame rail under the driver door area, normally were the frame turns upward at the front.
It is a silver metal canister with a fuel hose attached at each end.