Forgive me for asking---

RE: E rated tires.... a 2500 Series truck should already have E rated tire.

I haul an AF811 on a dually. Stableloads make a huge difference in handling, even on my dually. They are easy to install, unless someone despises working on their truck.
Rancho RS9000X shock are my other upgrade. I run the shocks at 8 or 9 when loaded.

We had the same truck (2008 GMC 2500, 4X4, CC, 6.5 bed) with a Lance 825 weighing I think about 2400 lbs loaded up. We added the stable loads, sway bar and airbags. The stable loads were great - and you can disengage them when not in use. We were pretty good with just the stable loads and sway bar, but used the air bags just to level out (about 30 psi left & 40 psi right). Overall the setup was really stable, not much sway at all. I've never used the Timbrens, but we were really happy with the stable loads and would definitely recommend them. To save money, have you thought about installing them yourself? The springs are already drilled, so it's just bolting things together.

Edit: we also had the Rancho shocks - they also made a big difference and was money well spent.

Tork lift adjustable lower stable loads and helper springs (I use the Sumo helper springs) Timbren, Hellwig also. I run 80lbs in 18" Toyo Open Country tires on Fuel wheels, Truck and camper are level and stable. The stable loads are very easy to install and you can purchase them for around $220.

realter wrote:
Stable loads close to $400 installed vs Timbrens at about same price installed

Truck is 2009 GMC 2500 4x 4, 6.5 foot bed, and camper is North* Laredo weighing close to 2,800 lbs Camper is about 11.5' high with AC unit, and I hate the sway around town. It drives pretty good on smooth interstate highways. I have a Roadmaster anti sway bar that doesn't make any difference in handling.

And sorry folks, I'd prefer not hearing what you have on your Fords and Dodges, I need Chevy/ GMC experience .

THANKS

I has a Dodge, so I won't reply....
Know that they work the same on all brands and the rear suspensions are basically the same between all brands (unless you're talking new rams with coils or air ride).

We have a 2006 GMC 2500HD Extended Cab 4x4 6.5' bed. We have an Outfitter Apex 8 camper.

I am not sure if the rear spring package is the same as yours. Ours has the overload spring under the spring pack. The significance is that when our camper is on, we want the overloads just touching the bottom of the rear spring package.

Our camper weights 3200# to 3500# depending on the trip. We have air bags to help carry the load but have found for reduced sway its best to fill the air bags to just before the rear spring pack is off of the overload spring. Its worked well for us.

We also have KYB Monomax shocks which we are very satisfied with.

Bubtoofat makes a good point on tires. We have Michelin LT285/70R17 D rating 3195# each. The tires are filled to 65 psi with the camper on. The fonts do not get any more air because my truck only carries about 300# more on the front with the camper on.

Sway is not an issue for us.

Good luck.

I have an 05 Silverado 2500HD and Northstar Adventurer. I don't have a problem with sway, but, my camper weighs less and the set-up is about a foot lower in height than yours. I have air bags and a Hellwig Bigwig sway bar. Maybe your tires have squishy sidewalls or the shocks need an upgrade?

Mike

Getting the factory overload springs to engage sooner and more fully certainly does help reduce body roll in any brand/model truck when carrying a camper. StableLoads accomplish that task and are easy to install.

Other things you can do that don't cost much are-

-Inflate the tires to their max anytime the camper is on the truck.

-Upgrade to E rated tires next time you change tires, if your current tires are D's.

-Change out all the factory rubber front end suspension bushings for polyurethane bushings from Energy Suspension or Prothane. It doesn't cost much and makes a big difference on any truck.

-Add a leaf to your overload springs, which stiffens up the overloads and raises the loaded ride height a bit, reducing sag and restoring proper steering and front end suspension geometry. Doesn't affect the unloaded ride, since the overloads don't engage when the truck is not loaded.

-Upgrade your shocks to Bilstein, KYB Monomax, Rancho 9000 adjustable, or whatever is your favorite heavy duty shock brand/model.