If you decide you need a cable.....
WITHOUT CRUISE CONTROL
GM still makes one for a NON-CRUISE 83
H/O. GM p/n 88959479. Lists for 93 and change!!! (CC1016) 83.5" long. The production cable is likely a 2 piece unit. The replacements are normally one piece.
These are all the p/n's it MIGHT be under- 88959479, 25033554, 15519256, 25032649, 25032664, 25033406, 25033405, 25033407
WITH CRUISE CONTROL
If it's got cruise, you'll need to figure out if it's the upper or lower cable squeaking. Probably upper, which is p/n 25032595 (CC1102) 41.3" long. AKA part numbers 25032869, 15592489, and 88959472
Lower cable w/W40 is 25032383, 25032278, 88959454 (CC917) 65" long.
Search ebay/rockauto.com, etc. They're available on the secondary market. $30-$40 or so for the GM stuff. Not sure about the aftermarket crap.