use item 20-273 to converts to premium sound systems
Car models: The years stated refer to the model's years of manufacture, please check the item description for information about any changes there may be within these productions years.
Cadillac - Escalade GMT400 (1999 - 2002 )
Cadillac - Seville (1998 - 2004)
Chevrolet - Blazer (1998 - 2004)
Chevrolet - Corvette C5 (1997- 2004)