Some numbers from your truck manual and actual weight of the trailer and truck would be a big help towards giving you the info your looking for. Truck GVWR & GCWR , Trailer GVWR.
Reading the post " Trailer weights and Tow vehicle sizing " will give you all the basics . I'll see exactly where that post is and direct you to it.
EDIT: Like a lot of things I got it backwards.
The first post in;
Trailer Towing & Tow Vehicle Discussion
Sticky: Tow Vehicle Sizing & Weight Calculator