Upgrade your charging system with a wide selection of Alternators for your 2007.5-2010 Chevy/GMC 6.6L LMM Duramax. In most cases, these alternators are a direct bolt-on and require no modifications for installation. They are designed to mount in the factory location utilizing the stock belt, and existing electrical connections. When you begin adding electrical accessories to your truck, the charging system can start lacking. Additional equipment such as auxiliary lighting, winches, and snowplows draw significantly more power than your factory charging system can support. Upgraded high-output alternators are capable of providing significantly more amps than the stock units they replace. Be confident you can charge your vehicle no matter what its power requirements. Upgrade the alternator in your vehicle today. Shop all the top brands including XDP, Mean Green, Leece-Neville, and more!