Although AMZ says this pump doesn't fit LBZ trucks, it actually does (perfectly). This is a 12 vane pump used in trucks after 2007.5 and up (LMM). The original LBZ pump has 10 vanes. If you are using larger tires than stock, this pump can help with steering. Please note that this is an AC Delco product marked 'Made in China' and therefore 4 stars.