The correct hitch for your 2004 Chevy Monte Carlo would be the part # C12028 that you referenced.
I attached the installation instructions for you to check out as well. view full answer...
It sounds like you are looking for the Replacement Retaining Ring for Bulldog and Fulton Snap-Ring Jacks part # FP908600 which works with both Bulldog and Fulton Snap-Ring Trailer Jacks like the Fulton Round, Snap-Ring Swivel Marine Jack part # FTJ120W0301 for example. view full answer...
For your 2002 Chevrolet Monte Carlo we have the hitch receiver, Curt # C12028.. However, neither are designed for the SS model because of the rear fascia.
The replacement hardware for either hitch is # RHK. To order the exact hardware you'll need to enter the hitch's part number and manufacturer. view full answer...