2015 Silverado 3500 & 19000lbs

I found this pretty interesting. I have been looking into new trucks and had talked myself into waiting until GM released the rumored 850 foot/pounds Dmax. However after a weekend of internet researching. I don't know if it is that big of deal except to satisfy my Type A mentality which is to have the most powerful Dmax available (without mods). I am seriously considering going 3500 SRW this time. I compared the specs from Ram and Ford, and than Utube videos of these pull off comparo's. It does not appear to me that the 850 ft/pnds buys anything in the real world. The tow ratings with 3.73 or similar ratios are much the same across the big three. What sold me, was noticing that on the Ford and Ram, that they will give the 30K tow rating to a 3500 but when it comes to the 45/5500 trucks it comes back down to the mid 20's. I know the power outputs are derated, I cant recall tow ratings being derated as well, but it is evident that the 30K tow rating is only for bragging rights, and the trucks cant live at that duty cycle for long or they would maintain that rating in the heavier trucks. Ultimately the Dmax has to have equal power to the other two to prevent getting slaughtered in the truck ads, but at the end of the day, when the 765 foot/pnd engine can do this well, I don't think it will improve towing performance in any significant way to increase the power. Combined with the fact that GM has been building this version of the Dmax since 2011, I think they have it pretty well figured out, that may not be the case with the 850 version.

I would like to also know the ambient air temp as well as coolant and tranny temp of the these trucks when they reach the top. That to me tells me more about the capacity of the pickup than does speed/time up the hill alone.