Mag-Hytec Rear Differential Cover, 2001-2019 LB7/LLY/LBZ/LMM/LML/L5P

Part# MAGAA14-11.5


WARNING: Cancer and Reproductive Harm - www.P65Warnings.Ca.Gov

Fits: 2001-2019 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ/LMM/LML/L5P Duramax Diesel with AAM 11.5" Rear Axle

This cover is the appropriate fit for your 14 bolt-11.5 differential, despite featuring only 12 holes. The removal of the top and bottom bolts accommodates the drain plug and temperature sending unit hole.


  • 8 Quart Capacity 
  • Overall height: 3 5/8″
  • Finned housing constructed of aircraft aluminum 
  • Pre-drilled and tapered 1/8" sender port 
  • Easy installation
  • Easy non-removal cover maintenance
  • Limited lifetime warranty for cover 
  • 5-year warranty for O-rings 


  • Mag-Hytec Differential cover
  • Bolt kit 
  • Magnetic drain Plug 
  • Dipstick


  • Although there are only 12 bolt holes, this cover ensures proper fitment for your 14 bolt - 11.5" differential. This is because the top and bottom bolts have been utilized for the drain plug and temperature sending unit hole. 
  • There are brackets on the top bolts, so some modifications will be needed on the brackets or additional brackets might need to be made.