Fuel filter & fuel sysetm flush

[Arizona Hummerboy]

My dealer ship is pulling the same thing, but there price for the same service was going to run me right at $600.00 dollars.
They wanted to charge me $100,00 dollars just to lube it, what a crock of BS that is.
Yhey had a hole list of things that should be done to it, everything was price over a hundred dollars that had to be done.
I looked in my owner manual and I could not fine in there what all they wanted to do.