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You are incorrect the " 2004 SAP Kit" did have the hood-I bought it at the dealer-specific part number for it, and as I said it was actually cheaper than the hood by itself from the dealer. I bought this car new off the showroom floor after the 05s had been out so maybe it was an SAP package for the 04 at that time. I sold the rear spoiler and still have the grilles that came in the package also.

From a dealer on the LS1GTO forums
"2004 Sports Appearance Package Available

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I Posted A Thread In Appearance Group. Gm Just Announced A Very Limited Release Appearance Package For 2004 Gto's. It Will Include
A 2005 Look A Like Hood For The 2004 (gm Tells Us The Hoods Are Not Interchangeable), Front Grille Insert And A Fancier Rear Spoiler. They Are Not Painted. Cannot Get Parts Separately. They Were Primarily Made For 2004 Gto's In Dealer Stock. In Fact, Dealers Cannot Even Order The Kits Thru Gm. They Are Being Distributed Thru Gm's "adi" Distributors (regional Gm Accessary Distributors). If You Want More Info Go To Appearance And Look For My Thread. If You Want Me To Order You One, You Can Email Me. We Are In California. Will Sell Them For $1400 Plus Shipping Costs.
Your Local Dealer Can Get Them As Well. Thy May Not Know About It. Have Them Go To Gm Messenger Board And The Messange Number Is Acc05-001
Dms "

The 05-06 SAP had all the valence/bumper stuff and since the exhaust was different would not fit.