Feature 1Manufactured on the basis of original standard, replacement for Chevrolet Avalanche 20072014. 2Used to add aftersales speakers to the door of the factory. Waterproofstrong plastic. 3The car speaker adapter is used for 6.75in/6.5in speakers, the thickness is 1/2in. 4Front and rear door speaker adapter is equipped with speaker wire harness. 5Easy to install, no complicated tools required, convenient and easy for you to use.Item Type:Car Speaker AdapterMaterial: ABS + MetalLocation: Front,Rear,Left,andRightDoorsFitment: For 6.5in SpeakersReplacement for Buick Enclave 2008 - 2012 Replacement for Cadillac Escalade / EXT / XL 2007 - 2014 Replacement for Chevrolet Avalanche 2007 - 2014 Replacement for Chevrolet Cruze 2011 - 2013 Replacement for Chevrolet HHR 2006 - 2011 Replacement for Chevrolet Sonic 2012 - 2013 Replacement for Chevrolet Silverado (New Body Styles, Crew Cab only) 2007 - 2013 Replacement for Chevrolet Suburban 2007 - 2014 Replacement for Chevrolet Tahoe 2007 - 2014 Replacement for Chevrolet Traverse 2009 - 2012 Replacement for GMC Acadia 2007 - 2012 Replacement for GMC Sierra (New Body Styles, Crew Cab only) 2007 - 2013 Replacement for GMC Yukon 2007 - 2014 Replacement for GMC Yukon Denali 2007 - 2014 Replacement for GMC Yukon XL 2007 - 2014 Replacement for Saturn Outlook 2007 - 2009 Allows you to install most 6.5in and 6.75in2 speaker adapter plates that are 1/2in thick .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List4 x Speaker Bracket4 x Wire Harness1 x Manual