K&N has designed a performance air intake system for the 2009 GMC Yukon and Sierra XL, Sierra 1500, Denali, Chevrolet (Chevy) Tahoe, Suburban 1500 / 2500, Silverado 1500. K&N dynamometer tests show a 10.82 horsepower gain at 5342 RPM with use of this K&N air intake modification. K&N tests multiple vehicles for each air intake system it makes to ensure a consistent horsepower and torque gain. This video demonstrates the steps needed to install a power gaining K&N air intake into 2009 GMC Yukon and Sierra XL, Sierra 1500, Denali, Chevrolet (Chevy) Tahoe, Suburban 1500 / 2500, Silverado 1500 Avalanche and Cadillac Escalade.
http://www.knfilters.com/video/77-3070KP_INSTALL.html
