I've had an ongoing problem with the rear leaf spring making a loud thud
when going diagonally into a driveway to keep from scraping.  It's on an '04
Z06.

I believe it started after I had a fuel pump replaced.  It's my
understanding that they had to drop the rear end and one of the gas tanks
(?) to replace it.   After that I started getting the "thud".

I took it to the dealer and they said the spring pack was loose and they
tightened it and charge me an hour of labor.  The a.shole service guy told
me they repair anything in the drive train but don't tighten bolts.  This
pissed me off of course since I have the extended warranty and since it was
to tighten something I believe they didn't torque right when doing the fuel
pump replacement.  So I paid the crappy service tech and went home.   About
a month later I got a check in the mail from Chevy agreeing that they should
not have charged me.   :<)

Now, it's starting to thud again going into the driveway.  IS THIS AN UNSAFE
SITUATION?  It seems that if the suspension is loose that this is not good.
Anyone have experience with this?   Dad?

Oh well, I'll take it back over for service.   Also need to get the "SERVICE
COLUMN LOCK" off the DIC.   Might as well do a 90 buck oil change while I'm
at it.

Thanks, Ed