I just found out that truck was serviced for all the TSBs. Maybe I am paranoid, but it seems like the rear is saggin a bit, almost an inch lower than the front. Are the coils for the TSB decent? I mean the TSB was one last year so I'm not sure whats the problem. Thanks for any input.

I haven't noticed any saggin in my TSB coils and I have about 150-200 lbs of stereo gear back there all the time. It seems like my front coils are the ones that are beginning to sag. I'm starting to get that hotrod, lifted rear look

well i can't answer your question but with my 250 lbs of sand in the back and ~250 lb bumper, my truck looks like a lowrider. time for AAL's and coilovers.