I would start by upgrading the alternator to battery wire, and making sure that all of your power wiring is in top shape.

http://www.grandprixforums.net/f81/a...nk-s-3304.html (Alternator Fusible Link(s))

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2000 NavyBlueMetallic GTP Coupe 14.007 @98.5 - New time coming soon!
HPTuners / Intercooler / 1.8 SLP Rockers / 3.1" / 180° / TB Shield / FWI / PLOG / Jimmy-C Downpipe / U-Bend Delete / Mark VIII Fan / Alt. rewire / FP rewire / F-Body Brakes / Buick Strut Braces / SLP Tips / 20% Tint