Yep.
A GMC is a Chevy with RPO Z88 added.
Here is some additional (generic) info for 1982, from the GM Heritage Center archives:
https://www.gmheritagecenter.com/doc...olet-Truck.pdf
You really can't go by the noun name of the color, because there is a bunch of Marketing/Studio influence in the naming.
What color is "Verdian Joule"? (answer: silver)
How about "Silver Topaz"? (answer: blue)
There's Tuxedo Black, Midnight Black, Camaro Black, Black Diamond and "Pot meets Kettle" Black (I am not making that up).
"Hugger Orange" on a Chevy magically becomes "Carousel Red" on a Pontiac.
Anyway - that's why the paint code and the associated WA number are the definitive handles when referring to a color.
Oh - and computer monitors are famous for not representing the actual color.
K