GM Active System Adapter ROEM-GM21A

199Active System Adapter for the following GM Cars:
CADILLAC ESCALADE 1999-2002
CHEVROLET S-10 BLAZER 1999-2001
CHEVROLET SUBURBAN 1998-2002
CHEVROLET TAHOE 1998-2002
GMC JIMMY 1998-2001
GMC YUKON 1998-2002
GMC YUKON XL 1999-2002