1988 1989 1990 1991 1992 1993 1994 Chevy, GMC & Cadillac EQ Control Cassette Deck for use with 3-Piece System. Vehicles used both EQ and non-EQ versions of this cassette deck. This is for a professionally remanufactured cassette deck with EQ controls commonly used in Chevy trucks between 1988 and 1994. It is designed to work alongside the 3 piece system with the Control Head and Receiver box. The unit has been fitted with a brand new, newly manufactured belt. This tape deck was manufactured with and without the built in equalizer or EQ. This unit has the EQ controls. Please contact seller with fitment or function questions. Please contact seller with fitment or function questions.