I have Passport 30 ft trailer that weights 5,000 lb I did tow it with Toyota Tundra 5.7L briefly but just did not want to drive a truck. What I ended up with is VW Touareg. I can not only keep up with traffic but I am the guy passing them on the left. Mine is 2006 model with V10 twin turbo diesel. It has 560 lb ft of torque. It actually weights more than Suburban. You should check out VW Touareg. They are pretty capable tow vehicles. Bonus is that mine has self leveling air suspension so I don't even have to have WDH.