Rendezvous Fuel filter 05 3.6 ltr AWD

I need to know where the fuel filter is located on my 05 Rendezvous. It's the 3.6 ltr and haven't been able to find it. I have expereinced a degredation in fuel economy over the last several months and engine runs perfect, thought I would change the fuel filter as a first step. Just changed all the transfer case fluids to remove the growling noise and it worked. Also have noticed the heated seats are intermittently not working. Last time they stopped working I pulled the fuse, re-installed and the worked fine. Will certainly do the same thing again, nothing wrong with the fuse itself. Overall no problems with the car at all. I live in the Netherlands and don't even know where I would get the car serviced if it needed it. Again have had since new with no problems except the recent growling when making corners and fixed that with the change of fluids. I use 100% synthetic in the engine and transmission, have used AMSOIL for thirty years and believe in it. Thank you for the help, also if someone knows how to get a shop manual, haven't changed the plugs on the 3.6 and it looks difficult.

fuel filter is located inside fuel tank,fuel filter is part of the fuel pump.has to be serviced as a whole unit.fuel filters that are in the tank will last for 100,000 miles.they do not have to be serviced until this milage.