If you mean the carrier bearing on the driveshaft - then you must have a v6 model. I would advise to skip replacing it and instead purchase a 1pc shaft (no carrier bearing). The cb is located near a Hi-Speed CV Joint which make changing the carrier a little difficult.
A new replacement 1pc driveshaft costs about $225.00
The carrier bearing itself may run $40-$140. ( http://www.fortwayneclutch.com/index.php/driveshaft-parts/carrier-support-bearings/gm/1993-2002-chevy-camaro-v6-pontiac-firebird-v6-carrier-bearing-new-f-body-carrier-bearing-for-v6-models-pn-s-3r80-40.html
) - for reference...
You could also check a junk yard for a 1pc oem shaft (most shafts there are bent or have bad uj's and will cost $$ to have fixed )
>1994-2002 f-body models all have the same length from the seal of the transmission to the center of the uj @ the diff.
>when looking for an oem 1pc shaft you will find them in Steel and Aluminum. Slight differences in length when measuring center to center of the universal joints ( 40 7/8" - 40 1/2" ) - but the slip yokes vary in length, weighted / non-weighted..etc = this will make it appear the the shafts are different.
>>watch out for oem shafts with the weighted slip yoke from manual 6spd v8 models. This slip yoke may hit the trans/exhaust mount that is used on v6 models.!!