Start with the ground wire on the battery. The bolt where it connects to the body is exposed outside and rusts causing a bad connection. It's an M8x1.25 bolt (about an inch long). Get a new one, and chase the threads with a tap. This fixed a number of oddball things on my car. Nothing as bad as the dash blacking out, but it's a cheap start at least.
2009 PBM GT
Under the Knife Again
Wiseco Pistons, K1 Rods, Johnson Lifters, BLP Keep Hatin' PDS Cam, Roto-Fab, BLP Ported Intake and Throttle Body, Kooks 1-7/8 long tubes, XForce Varex Catback, ZL1 Converter, Camaro Trans Pan/Filter, GXP Brembos
Breyton GTS-AV Wheels, 6k HIDs, Holden Steering Wheel and Paddle Shifters, Eibach Springs, 35% Tint
Tuned by Day Tuning