Where can I find dimensions, specs of used cars?

I've tried Edmunds, autos.msn.com and many other sites but I can't find a good reference that has size specifications for used cars, going back 10+ years. Those two sites I mentioned have some size specs but often they don't have interior cargo space dimensions for all years.

I'm looking for a used van or SUV but I can't find any site that tells me the exact interior cargo space for all the years and models I'm interested in.

Thanks for any ideas on how to easily get this information.

One thing I've found that works is to do a Google search for " specifications for a vehicle year , make , and model " ! For example , put into search " specifications for a 2001 Pontiac Gran Prix " and you generally will get most of the info you're looking for . This should work for most any automobile produced in the last 10 yrs . ! Good luck and let us know if you find what you're looking for !