I have a bad bed tilt. Where the bed meets the cab is level, but there is at least a two inch difference between the height of the left and right sides at the tailgate. Body bushings appear okay. Rear leaf spring bushings are cracked, but are identically worn on each side. I'm the second owner, but it does not appear the truck has ever been in an accident that would cause a bent frame.

Any help is appreciated -- thanks

That's not tilted, that's twisted. There are two (or is it three?) cross-rails on the bottom of the bed (welded into the bed) that sit on the frame. I'm thinking that rail has rusted and/or collapsed in the back on the left side. Sticker on the tailgate suggests this truck, previous to its present sun-belt home, has a northern provenance (Sioux Falls SD?). There's this stuff we use up here called road salt, and.....

You are correct, sir -- it's twisted, and I bought it in Sioux Falls, SD. You should work as a CSI;-) I'm fortunate with respect to the rust -- there is normal surface rust on the frame, but very, very little on the under-body. Cross rails are in-tact and not crushed or rusted. Truck is in pretty good shape if you can ignore the twist -- only 120K miles. Any other ideas?

Have you measured the distance between the frame and bed? and frame/bed and ground? My truck sits the same way and took me a while to find the issue of 2 different rear springs in the truck. If the mesurment between the frame and bed are the same then you know its a frame/spring issue

Thanks, I'll try that.

So what ended up being the problem

Body mounts. the rear passenger side LOVES to crush

Sorry for the late reply. Zrock is probably right. I'm pretty sure that the left spring has sprung. I ran a string between the spring hanger bolts and measured from the string to the center of the spring's u-bolt plate. There is a 2" difference between the spring on the right and left.

I've been doing some research on the 99-05 B Code spring mod, but I can't figure out exactly what needs to be done in order to do it. From what I can gather, it requires some drilling. Can't figure-out if the drilling is required to enlarge the spring hanger holes, or if the frame needs to be redrilled to remount the spring hanger.

Any help is appreciated.

You need to drill out the front hanger to match the SD spring.

IF I remember correctly, you also need to drill out the shack to match the SD spring as well.

I am still betting on a bad cab mount bushing

Thanks, Brad. It may be the bushing, but the springs are off by 2", so there is something suspect about that. It couldn't hurt to replace the suspect springs and mod for a better ride at the same time. It may fix the twist, but if it doesn't, at least I have a smooth riding, twisted truck. If it's a body bushing -- then screw it. That's in the "too hard to do box" right now.

Just so I don't get into this over my head. There is no drilling into the frame for the B-Code mod, right? Just enlarging holes in the mounting system (Front Spring Hanger and Rear Shackle) to fit larger spring eye bushings of the B-Code springs?

Also, I've seen recommendations to get OEM springs only, vice aftermarket springs. Does that sound like good advice?