Newguy looking for info on Autotrac

[tipsz]

Hello All, I've been out shopping for a new truck and I don't quite get the difference in Autotrac vs AWD vs regular 4WD. I've found 2 new trucks I like, both Z71's both with the 5.3 aluminum block, but only one has Autotrac. I don't really trust what the saleman was saying. I'm more interested in 0-60 times. What do the experts here say? Thanks,

[docgreen9]

tipsz ... I just googled this for ya ... hope it helps. Quote:

Sierra offers Work, base, SLE, and SLT models, plus the top-line Sierra Denali. For '05, Denali is a Crew Cab instead of an extended cab. It comes with all-wheel drive that lacks low-range gearing. Other Sierras offer rear-wheel drive with optional traction control or two 4WD systems: a basic system that should not be left engaged on dry pavement, or GM's Autotrac that can be left engaged on dry pavement. Both systems include low-range gearing.