GM has designed in a lot of "got'chas" to cost you money after the sale, and this may be one of them. Volkswagen, BMW, and GM have the most tricks built in that cause these problems after simply disconnecting the battery. Newer vehicles are often worse.
Expect to make a trip to the dealer, but first check the owner's manual, or the service manual if you have one, to see if there's a procedure to reprogram the computer. The only one I'm familiar with was on the '97 and '98 Caravans and getting half of it to pass could be extremely frustrating. The procedure was initiated by pressing certain pairs of buttons on the control panel.
Monday, July 2nd, 2012 AT 10:09 PM