Ok, this tab is 99.9% right! Keep in mind that on the album, the bassist plays this on a standup bass, so it's not gonna sound just like it does on the album, but it still sounds close.

Sublime - What I Got

Main Riff:
G------------------
D-------5h7--------
A-5-5-5------------
E-----------3------

That's it. Just keep repeating that 1 riff throughout the whole song.