Here is a tab for 2 Pac, Hit em up.
It can be played on bass too. It's just regular tuning. 

E-----------------------------------------------------------------
B-----------------------------------------------------------------
G----------------------------------------------5--4-2-------------
D-------------------0--0----0--0-1-2--2--0-2----------------------
A--0--0----0--0-3-0-------3----------------------------3-2-0-0---0
E--------3-----------------------------------------------------3--