If you need more charging power for your 1996-2001 GM vehicle with the 3100, 3.1 liter or 1999-2001 3.8 V6 powering the the 100-105 amp CS-130D type alternator, like the one 
shown below. You can now install the MONSTER CS-144 
type large case alternator in both single and the 
Extreme Duty Dual Rectifier versions.

If you have this alternator on your GM 3.1 engine you can install up to the 250 amp dual rectifier shown to the right.
All you need is the simple "U" bracket shown with the alternator.

Installation  Done...