The 2004 was/is also available on the plan, the tough part was finding a dealer willing to honor it. As the number of units increases, dealer packs and lack of support of the GMS plan price may begin to soften.
That is what I have heard from many forum members. I guess our store is unusual, since we honor the programs as long as the vehicle is eligible. We had the same complaints of dealers not honoring to eligible customers with the CTS-V. Hmm.