R134 Low Side Cap
 

Yes, the little black cap. I lost it today. Should it matter, 1994 LT1. Imagine r134 low side caps are pretty much all interchangeable. Parts stores want to sell kits in the teens of dollars which I’m unwilling today pay for a simple cap.

Did you find a cap yet? I know you posted thread in June so it's been awhile. I think I might have what you need. Let me know if you are still looking. Thanks.
Gary

I did, but thanks for checking in