The Social Security Death Index at
www.familysearch.org lists 29 men named Manuel LOPEZ that passed on in 2005, and there's no guarantee that the man you're searching is one of them.
Maybe you can figure something out by the last residence (listed for some names.) You can also discount some of the men by their birth year. If you were born in 1986 I doubt the Manuel LOPEZ born in 1903 is the one you seek.
Do you know where he lived? Did he have any siblings? Do you know Manuel's parents names?