Rick, We've been towing a Tahoe since '08. We live on the left coast so lots of climbing and an occasional short back-up to get out of a jam. We are using a Roadmaster Falcon 2 which also has a 6000lb capacity. No problems or even a hint of one. We are using an M&G brake system. This is the third vehicle we've had the M&G system installed on and it works beautifully. Many of our friends are using the AirForce One system and I hear that system works well also. I do know it's more complex than the M&G system. I would recommend that you don't tow the Tahoe without supplemental brakes, especially if spending much time in the hills. As to bus performance with the heavier vehicle, we've noticed no difference between the Tahoe and a Saturn Vue we had previously. We're still getting 7+ mpg. 62mph.