Dealership inventory reduction, factory GM OEM part, not a cheap aftermarket part. This is the light that came on your vehicle when brand new. Fits the 1986 1987 1988 1989 1990 1991 1992 1993 Chevrolet S10 Blazer and S15 GMC Jimmy, mounts on the roof in the center, often referred to as the high mount third stop or brake light. Condition - new never installed but has been in a dealership parts bin cabinet for years so DOES have a few light marks on the surface lens  from storage.