Just bought a 96 Vert Z28 - I got a nasty creaking coming from the rear when the suspension
compresses. Since NJ temperature has been running in the teens lately I haven't really had the
drive to crawl under and look. I am hoping that is as simple as sway bar bushings. Anybody else
had this problem?

 

That's what happens when it's 10 below outside - I'd wait until Spring to check it. Mine is doing that right now, too, but it doesn't when the temperature is normal (e.g. - above zero kelvin)