Corsa Part #44906 Air Intake Cadillac Escalade, Chevrolet Silverado, Tahoe, Suburban, GMC Sierra, Yukon, Denali, Denali XL 2009-2014 Escalade, Suburban ,Tahoe ,Yukon, Denali, Denali XL 4.8L, 5.3L, 6.0L, 6.2L 2009-2013 Avalanche, Silverado, Sierra, Sierra Denali 4.8L, 5.3L, 6.0L, 6.2L CORSA PowerCore Closed Box Air Intake System Lasts up to 150,000 miles or 4 years, NO oil needed Carb Legal EO# D-758 4.8L Avalanche Not Included