Re: New (to me ) Truck
'13 Silverado has the 315hp 5.3L, that motor runs decent, it's pretty much the same drivetrain (except the having a 6 speed trans instead of the 4 speed trans) that was in my '02 Silverado and '05 Avalanche. 7,000# towing on flat roads it will be fine, 7,000# in the hills, it will be working hard. By comparison, I have a '13 2500HD, Ext Cab, 6.5 bed with the 6.0L (360hp) and HD 6L90 trans. Mechanical fan, HD cooling system, trans cooler, etc. 2500HD comes with either 3.73 or 4.10 gears, mine has 3.73's. It's a beast of a truck compared to the 1500. The other big thing between the 1500 and the 2500 (and the 5.3 vs the 6.0) is cylinder deactivation. 6.0 doesn't have it.
I towed up to about 5,000# with both the '02 and '05 that I had. I also had a '15 1500 4x4 that was a nice daily driver, towed up to about 3500-4000# with it, handled that fine. From my experience, I know what they say in the literature, but I wouldn't use a 1500 for anything more than Class III towing (5,000#). When you step to the 2500HD you get a true Class IV tow rating (10,000#), it's a big difference. At 7,000# you'll be using a load leveling hitch on the 1500.
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