Spark Plug Wire is a direct fit for the following:

2005-2008 Pontiac GTO
2005-2006 Pontiac Grand Prix
2005-2008 Chevrolet Trailblazer
2005-2008 Chevrolet SSR
2005-2007 Chevrolet Corvette
2005-2007 Buick Rainer
2006-2007 Chevrolet Monte Carlo
2006-2008 Chevrolet Impala
2006-2007 Cadillac CTS
2007-2008 Chevrolet Tahoe
2007-2008 Chevrolet Silverado 1500
2007-2008 Chevrolet Silverado 2500 HD
2007-2008 Chevrolet Silverado 3500 HD
2007-2008 GMC Sierra 1500
2007-2008 GMC Sierra 2500 HD
2007-2008 GMC Sierra 3500 HD
2007-2008 Chevrolet Avalanche
2007-2008 Cadillac Escalade
2008 Hummer H2
2008 Hummer H3
2008 Chevrolet Express 1500
2008 Chevrolet Express 2500
2008 Chevrolet Express 3500
2008 GMC Savana 1500
2008 GMC Savana 2500
2008 GMC Savana 3500
2008 Buick Lacrosse
2008 Buick Allure
5.3L 6.0L 6.2L Engines Only

Genuine GM Part Number: 89018057