For LS Manual Belt Tensioner w/Pulley, for Escalade, for Tahoe, for Sierra/Yukon, for H2 Manufactured from 6061 T6 billet aluminum and CNC machined for precise fitment.Features an anodized black finish to resist corrosion and extend service life.Includes a 1/2 inch drive hole for easy belt tension adjustment, consistent belt performance and preventing slippage during.Designed to maintain proper belt tension under all conditions.Compatible with LS engines including applications for 4.8L, 5.3L, 6.0L, and 6.2L models.Fits Gen III and Gen IV LS platforms with standard water pumps and crank pulleys.Matches OEM part numbers 12554027, 12580162, 12609719. Important: This is a non-OEM part.Any brand or model cited is used to denote device compatibility.