Transmission Filter Kit Fits Allison 1000 2000 Series Compatible with 2001-2010 Chevy Silverado/GMC Sierra 2500 3500HD 29537965 Shallow Pan Filter & 29539579 Spin-On Filter 6.6L Duramax. 【Product Type & Specs】This Allison 1000 Transmission Filter Kit includes genuine components: Internal shallow pan filter 29537965 and external spin-on filter 29539579, both matching OEM specs.