brake problems
Welcome aboard and you REALLY did come to the right place.
The fluid is added through a access door about where your right knee would be over the floor board while seated in the drivers seat.
If you have a winch, the door is just to the left of the PTO engagement handle.
Blow off the area if you can with a air hose. You will need a short 11/16 or 3/4 wrench to remove the cap from the top of the reservoir.
DOT 5 fluid (not 5.1) is what is needed.
If you can pour very slowing, you can get away without a funnel but most of us (me) use a transmission filler funnel (very long spout).
If you read the Lube order it will show you a little more on the general servicing of your truck.
Attached is a single page from one of the TMs that shows a little detail about where you need to be.
You can download the TMs here on the S.S. site by going to the Reseouces section but this one page is in the middle of the process and is a good place to start.
Ask if you have ANY questions. You may have to right-click and "save-as" the PDF page to your desk top in order to open it.
Jim