It is very important that you don't let the DMV registration renewal for your Chevy van to lapse more than 90 days; or else you will not be eligible to turn in the van to the State of California and get money for it.
The vehicle buy back program will pay $1500.00 for your van (condition do apply) if you are low income, and $1000.00 flat if you are not. Again, it is important to get approval from the state before the van's registration has expired over 90 days.
Get more information on how to retire your Chevy van to the state by following this link.