2007.5-2010 Chevy/GMC Duramax LMM 6.6L Parts - Step Bars | 2007.5-2010 Chevy/GMC Duramax LMM 6.6L - AMP Research - Innovation in Motion - Amp Research BedStep™ | Chevy Silverado/GMC Sierra 1999-2007 | 75301-01A