Earlier this week we brought you word of GM's new incentive program, March Madness, and now the details are here. A $1,000 cash back incentive will be on most vehicles that have been in inventory for 125 days or more. Dealers will flag these cars with a red tag to make them visible for shoppers. The bounty is upped to $1500 for most Cadillacs and three vehicles, the Chevy Equinox and Aveo and Pontiac Vibe, will only have a $500 incentive on the hood. The extra money can be combined with other offers and any vehicles that aren't backlogged 125 days, like the Corvette, will be excluded. Got to put that NCAA license to good use.