So I've seen a few of these threads for other areas can't find a good So. Cal thread. Anyone have a good dealer recommendation to get the GMPP Stage Kit Upgrade & Tune? I'm having dealers give me quotes of $650+ just for labor which seems insane, considering most people seem to be getting for $150 or lower for installation and flash. Plus it would be nice if the dealer had some experience installing one already, might be able to trust their quote more. Anyone anyone? OC/LA area but I could expand the area a lil if necessary.