This is a relay often found for THIS particular use of it.. up on the Firewall... may have a number printed on it which may start with 14088xxx.....
Note the shape of this.. and if need be the pin positions.
GM no longer makes this part but luckly another company does.
Fits all 85-89 series Firebird and Camaro & has other uses in various US GM Cars.
The relay WIRING is also available separately.