[TAKPAK]

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1- I'll be towing with a 2011 sierra 3500HD dually four-door,do i need either the short,med or long box?
2- Should i buy the 5 year extended warranty?
3- Will it hold up well over say ten years,will the maintenence become an issue?
4- I Keystone good with their warranty work?
5- Iv'e been warned that Keystone uses "China Bomb"tires on their new rigs,is that true?
6- I will be hauling a 5x10' cargo trailer hehind it on occasion,will the Montana handle that?

Number 1: Great choice. I have a 2008 3500 GMC Sierra SINGLE rear tires and love it. One thing you will get on the 2011 that I don't have, is an exhaust brake. I'm harrassing GM about retrofitting the older rigs.
Number 2: Your choice, it IS expensive, but then so is replacement of say, a refrigerator. Haven't used our warranty.....yet!
Number 3: Should be no problem....IF you take care of it.
Number 4: They've been good to us so far.
Number 5: Don't know what the new rigs have. Dang near everything is made in China now. I know the Big Sky's were running Carlisles.
Number 6: Bad idea. I don't think Montana will warranty the trailer if they find out, and that's a LONG rig you will be pulling. Some states won't allow it. And, as others have said, the frame could be an issue.