Fits: 2001 thru 2019 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ/LMM/LML/L5P Duramax Diesel with Allison 1000

This magnet sits on top of your factory installed Allison spin on filter and commonly get tossed out when servicing. Always make sure yours is in its proper place and if not pick one up with your order.