I have towed my Montana with a 2004 2500HD LLY Duramax with an edge Juice, both with air bags and without. I towed with the Juice set on level 2. There were less down shifts and better fuel mileage. Towing without the bags was all I wanted for a load. The truck seemed maxed out. With the bags it seemed like a more comfortable ride. There was virtually no sag at 85-90 LBS. I did notice a little bounce on bumps or rough road. A shock upgrade might help. I now have a 2009 3500HD dulley. This was a huge upgrade. The 3500 is a LOT! more stable. If you are going to tow any distance I would install airbags. If you are towing short trips the 2500HD will tow OK without them (with some sag). I think at some point in the future you might want want to consider a 3500HD Dulley if you are a serious RVer or towing any distance. No white knuckle driving!
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