Although he didn't get a pass, Gravano was marked for death by Peter Gotti. Huck Carbonaro and an associate, Fat Sal, made an elaborate, well-financed plan to track him down and blow him up in Tempe AZ, where he was operating a swimming pool construction business. The plot failed because the Feds arrested him on a drug dealing charge:

https://www.nytimes.com/2003/05/16/...saved-him-from-murder-officials-say.html