One problem related to rear suspension shock absorber has been reported for the 2000 Chevrolet Blazer. The most recently reported issues are listed below.
Brought vehicle to dealer after I had an oil change at an independent mechanic. Mechanic told me I should take truck back to dealer since my rear shocks were very wet (leaking) and they are sealed and should not leak. Brought to dealer, never even bothered to look at it (since they'd probably have to replace them since they were under warranty) but told me "Chevrolet has stated that a little seepage is normal". Problem continues now, with 43k miles on it, and they are far from "a little wet" - but completely black (and they're yellow shocks) - constantly wet, and truck rides like there are no shocks. Will bring back to dealer again, and of course, now it is out of warranty, guarantee he'll tell me their bad.