From what I've been able to gather...
TRIM is an OS command, you don't call it, the OS does. So there's no 'TRIM' utility.
It's called (by a compatible OS) when you delete a file from an SSD drive. See Here and Here.
The SSD drive firmware needs to support the TRIM command as well.
If you want to "reset you wear leveling tables" then you're going to have to wipe the drive completely, as it requires either re-writing every block on the drive to one state; or by wiping the LBA tables by issuing a "SECURE ERASE" command (see here) - AKA 'low-leveling the drive'.
All of which will blow away your OS (and anything else) if it's on that drive, effectively preventing you from doing it from within the OS. :)
If your SSD is a COMPLETELY separate drive from your OS drive(s) you may be able to get some decent results by using a good 'secure hard drive eraser' app of some kind, but I wouldn't count on it.