Package Includes: 1 xFuel Tank Filler Cap Replaces Part Number: GT335, 20914961 Fitment: Compatible with Buick Vehicles: 2007 2011 Lucerne 2005 2007 Terraza Compatible with Cadillac Vehicles: 2005 2006 CTS 2007 2011 DTS 2004 2005 Escalade 2004 2005 Escalade ESV 2004 2005 Escalade EXT 2005 2007 SRX 2006 2007 XLR Compatible with Chevy Vehicles: 2004 2005 Avalanche 1500 2004 2005 Avalanche 2500 2005 2007 Cobalt 2007 Corvette 2004 2008 Express 1500 2004 2008 Express 2500 2004 2008 Express 3500 2005 2008 Uplander Compatible with GMC Vehicles: 2004 2008 Savana 1500 2004 2008 Savana 2500 2004 2008 Savana 3500 Compatible with Pontiac Vehicles: 2005 2006 Montana Compatible with Saturn Vehicles: 2005 2007 Saturn Relay How can you tell the Fuel Tank Filler Cap/gas cap needs replaced 1.Cap does not tighten properly Most Fuel Tank Filler Cap/gas caps are designed to click once they are tightened sufficiently. If the cap does not click, or clicks and then pops loose again then that may be a sign that it may need to be replaced. 2.Fuel smell from the vehicle If the Fuel Tank Filler Cap/gas cap seal becomes damaged or worn it may cause fuel vapors from the gas tank to leak from the filler neck. This may result in a gasoline odor from the vehicle as a result of the escaping vapors. 3.Check Engine Light comes on A bad or failing fuel cap will not necessarily cause major performance issues, but it can set off the Check Engine Light, which will prevent the vehicle from passing an emissions test. If you suspect that your gas cap may be having an issue, please take a minute to check the gas Warranty: 1 Year Warranty After Receiving. All Products Shipped Are Tested A