Looking at 2015 Tahoe Z71 4x4 with a 3.42 axle ratio. The dealer tells me this has a standard (6400#) tow package but I am thinking that it might have a Max (8400#) tow package since it has the 3.42 axle ratio instaed of the 3.08. What I am trying to get an answer to is what is the towing capacity of this vehicle. It is a Range Rover dealer that hasn't a clue about chevy specs. Is there some way I can tell? In other esearch I found that you cannot get the max tow package without the 3.42 axle ratio. Is the opposite true that you could have a 3.42 ratio and still have the standard tow package? Bottom line for me is that I am looking for one with the max tow package.