January 5, 2006 and GM is running TV ads for the 2007 GMC Yukon/Chevrolet Tahoe. At least the early buyers will get 18 months before the 08s come out and make their 07 a year old.
There was a time when many of the European imports (to the US) didn't change from year to year. This let manufacturers ship new serial plates to dealers who made last year's leftovers into this year's latest and greatest. Buyer beware.