Which side of your rig is your fresh water tank on and do you have water in the tank?
1 gal of water = approx 8 pounds.
20 gal = approx 160 pounds
50 gal = approx 400 pounds.
I noticed on my Miramar I filled the water tank for a dry camping trip, (100) gal approx 800 pounds. She was listing a lot to the right, (fresh tank on the right.) While parked in my driveway, I put down the right levelers, to raise that side, so it wasn't putting too much strain in the suspension system. I figured once I was in motion, it wouldn't be as bad!
The other culprit may be loading, do you have too much weight in your lower bays on one side? If you think that may be the case, drive over a DOT scale on your next trip, put your right wheels or left slightly off the scale. Take that weight down, then weigh the whole rig and subtract the difference to find your other side weight!
Hope this helps!
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