If you've seen it on a truck before, that color might be "Carbon Grey Metallic"...or maybe just "Carbon Metallic". It's mostly grey but has a slight green tinge in the sunlight, but is grey at night. That forest green is green 24/7. "Carbon Grey Metallic" was available from 03-05.What I'm looking for is a green in the daytime and black at night in a GM color. This truck looked that way to me. Thanks again, Daniel U