So now I'm eyeballing my truck every time I see it looking for one side higher than the other.
The interesting part is that on level ground it seems level, or at least as close as it possibly could be (at most .5" out driver to passenger).
However when parked on a slant it's not entirely even side to side and obviously looks slanted. IE it's more like 3-4" higher on one side than the other when measuring from the ground on each side. Which is I guess how suspension is supposed to work?
Any additional investigation I can / should do?
Thanks!
GMC Sierra 2500hd 2004.5 now with ARP studs
Spring height concerns should only be addressed when the truck is on a level surface. On an old(er)/worn-in truck, the front end Z-height should only be measured while the rear frame is suspended/supported at a specific height to compensate for worn/worn-in rear springs. Once the front is correct, then the rear can be measured. Do not expect it to remain in a similar appearance when parked on non-level ground. With a relatively high CG (Center of Gravity), it doesn't take much of a gradient to cause load differentials on the suspension, and cargo, fuel and accessory loading can affect that, as well. Simply, on a truck with thousands of miles on it (especially loaded/towing), if it's close, it's likely OK.
Having the box off makes it easier, but not by much. Unload the springs and disconnect a hanger at one end. Measure the arc height and eye distance of both springs. I think you'll find they will be within a fraction of an inch (a few millimeters), which is within the spec. of new springs. This is also a good time to clean/inspect bushings and hardware, and replace as necessary.
Back when I first setup Lil Red, my Duramax conversion truck, I noticed that one side up front was not at the exact same height as the other side. I used the torsion bar adjustment bolts to make the right/left heights equal. This also made the rear of the truck equal in height side to side. So, upfront side to side torsion bar leveling has an effect on the rear of the truck too.
Contact Me
Lil Red - Duramax 6600 Conversion
Content Web Site
The Diesel Page - 6.2L/6.5L Diesel Books
The 6.2L/6.5L Troubleshooting & Repair Guide
Duramax Diesel Conversion Guide
Duramax Diesel Service Guide - How to Replace Head Gaskets, Injectors, Water pump, and more - New!
Photo Album
TDP Youtube Channel - New!