.
If you call any local GM dealer and provide them your vehicle's VIN number, they will provide the vehicle's pulling power (built at factory).
Subtract all Tow Vehicle internal passenger and rear cargo weight items. Subtract this total weight number from your provided Towing Weight "empty vehicle" MAX towing power weight number. Thus, giving you the real MAX towing weight number - for your "average loaded" vehicle. Then, subtract 10% of this weight number for towing against strong head wind and up steep hills. Thus, creating the "most comfortable" MAX towing weight number. Especially for an older 2000 age vehicle (being used as a Tow Vehicle). Remember... A vehicle consistently towed at this max numbers has a high risk of blowing a transmission or having some other high stress problem.
Being a pickup, one can then decide if you want a TT or a 5er. A 5er is a friendlier towing shape (due to position of its pin weight) but one looses the rear space of their pickup. The same floor level TT shape is great for someone with bad legs. re: No stairs into the master bedroom area.
Then, one must decide if they want a slide or NO slide. Some folks love slides and some folks hate slides. If wondering, slides do add extra weight (of same length of TT). Which may also mean shorter length in TT or 5er design.
For any Trailer (TT or 5er design), one then decides on floor plan. Some trailer's have better layout for watching TV (like on rainy / bad weather days) and others have better bathroom location. For me, I like bathroom near the main door and bedrooms at both ends of the TT. And, middle area of kitchen and living room area. For others, they like living room in rear with large sofa chairs - looking out large rear windows.
After good floor plan is finalized, decide if brand new or pre-owned. If wondering, I buy 1.5-3 years pre-owned. I get great financial deal and do NOT get extended warranty. I've yet to encounter a problem that I couldn't fix myself. And when I do fix it myself, I make better than factory (so it won't break again). Remember that brand new doesn't mean problem free. Being 1.5 - 2 years old means the 1st owner mostly likely got the little warranty repair items fixed (under their hassle and time).
The above might work for you as well...
.