They made 2500 series Avalanches too...
My F150 has a longer WB than even a 2500 Suburban... I've got a 139" WB and a new Burb is only 130".... ;)
There is no sway control hitch or device that is going to make up for an inexperienced driver... plain and simple... Was it the inexperience of the driver or the hitch that contributed to this accident?? Who the heck knows?? You all can say it was 'this or that', but no one knows for sure...
My guess would lean towards 'inexperience', but that's only my guess with no other info, other than the article..
Be safe out there... Remember, it's not ALL about "tow ratings" and vehicle size.. The stuff can hit the fan for any of us... ;)
Mitch