Gruntruck is an American grunge band formed in 1989 in Seattle, Washington, by vocalist Ben McMillan and drummer Norman Scott, both previously from early Seattle sound pioneers Skin Yard. While in Skin Yard, Norman also briefly joined Soundgarden, and collaborated with Chris Cornell on a lesser-known band, the low frequency power trio Bass Truck. Lead guitarist Tommy Niemeyer from crossover thrash band The Accüsed and bassist Tim Paul, previously of Portland hardcore punk band Final Warning, rounded out the initial, classic lineup.

Skin Yard was an American grunge band from Seattle, Washington, that was active from 1985 to 1992. The group never gained a mainstream audience, but were an influence on several of their grunge contemporaries, including Soundgarden, Screaming Trees, and Green River.