Fits: 2001 thru 2015 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ/LMM/LML Duramax Diesel 

Brand New OE replacement oil pump for your Allison 1000 transmission. This is the most current 22 tooth pump design. Also works with transmissions that utilized the older 31 tooth design as long as the included wear plate is installed.

Features: 

• Genuine Allison Part

• Allison Part#29545809