Welcome to the forum LaFortune,
We don't have a toyhauler, but we do have an '06 Duramax, crew cab, standard bed.
I'm *guessing* that your Razor weighs about 1200 lbs, and that you typically dry camp??
That said -- be careful about how much total cargo weight you add to the trailer. With the Razor loaded,
plus a full tank of fresh water (875+ lbs), and 3 LP tanks, plus food, clothes, tools, fuel, generator?, etc...
you'll quickly reach your truck's max towing rate before you know it. (12,000 lbs. trailer/bumper pull for the '06).
Specs from Keystone website -- IMHO, the 1000 lbs hitch won't be adequate.
2012 Fusion 300
Shipping Weight 8490 (dry, no options)
Carrying Capacity 4510
Hitch 1300 (dry, no options)
We've never towed with a 'lifted' truck... hopefully someone can offer input about that.
Terri, the Chevy co-pilot