Rear end noise from leaf springs

[TNTSierra]

I just got my truck back today because it had the rear "clunking" noise coming from the leaf springs. I did spray them with WD-40 and it only helped a few days. I looked into this issue further and found out their is a TSB out on our 2014-2018 trucks. If anyone needs this done the TSB #18-NA-183

 

It totally solved my problem and the truck is so quiet again!  I know this was somewhere else on thread, but I just started a new one. Take care

[sddoublee]

That will be cool if this is my noise.  Took 3 of us, (2 with good ears and then me) to say it was coming from the rear part of the truck.  Noticed the left bottom spring has moved a bit and no longer straight with the rest of the pack.  Gives me a place to look when it gets light out.  Thanks.