It doesn’t really matter as it relates to SEM paint. There’s nothing, zI repeat....NOTHING that SEM uses to cross-reference their color codes to GM’s interior color codes- believe me, I have looked. And looked. I tried when painting the interior of my 02 Denali and again when painting interior ( in something as simple as black) in my 08 Silverado. There’s zero cross- references. 92I/ 922/923 mean nothing to SEM, and the SEM numbers mean nothing to GM. It’s like they don’t know the other exists.I do believe the 01-02 RPO code differs from 03-06. I could totally be wrong(it’s happened once or twice lol)