I'm just wondering if I'm the only person that has had problems with the factory springs sagging, from pulling heavy trailers.

On my 02 (3/4 ton) the springs needed to be re-arced and heat treated. I added an extra leaf and some timbren rubber rides, and never have had another problem pulling the same loads since.

I have been pulling the same trailers with the same type of loads with my 04 (1 ton), and the main leaf pack is sagging. I had put the timbrens on the first week that I got the truck. The truck is now riding on the over load springs and the timbrens full time, this without a trailer hooked up.

I'm now headed to the suspension shop for a re-arc and heat treating that should have come from the factory to begin with.

In trying to generate a quality riding vehicle, GM has removed the HD from the rear suspension.

What kind of tongue weights are running?

U must be loaded most of the time too.

Why not go to an air ride booster springs instead of the timbrens since the air bags lift all the time rather than when the truck is on the stops.