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--