Covers U.S. and Canadian models of Chevrolet Silverado and GMC Sierra Pick-ups(1999-2006 and 2007 Classic models), Chevrolet Suburban and Tahoe, GMC Yukon, Yukon XL, Sierra Denali and Yukon Denali (2002 and 2006), Chevrolet Avalanche (2002-2006) Two and four-wheel drive, gasoline engine versions.