[SS Tim]

Rare is a very subjective term and on a GMC I am the wrong "Tim" (calling Special K) to ask. But the color is listed as normally a Chevrolet only color. It may have used only on the Sierra Grande RPO YE9 GMC trucks. It is seen a lot on Chevys though and a really nice color. This is by far a better choice than the blue and white not so Super Chevy you were also looking at.