[Vehicle Fitment]: Compatible with Cadillac Escalade 2003-2004, Escalade ESV 2003-2004, Escalade EXT 2003-2004; Compatible with Chevrolet Silverado 1500 2003-2004, Silverado 1500 HD 2003, Silverado 2500 2003-2004, Silverado 2500 HD 2003-2004, Silverado 3500 2003-2004, Suburban 1500 2003-2004, Suburban 2500 2003-2004
[Vehicle Fitment]: Compatible with GMC Sierra 1500 2003-2004, Sierra 1500 HD 2003, Sierra 2500 2003-2004, Sierra 2500 HD 2003-2004, Sierra 3500 2003-2004, Yukon 2003-2004, Yukon XL 1500 2003-2004, Yukon XL 2500 2003-2004; Compatible with Hummer H2 2003-2009
[Special Note]: Optional Filter - Not installed on all models, some vehicle may not be retrofitted to receive a filter. Verify vehicle is equipped before purchasing.