Yukon 4340 cut to length shaft for GM 14T & 11.5″, 30 spline, 34.8″-38.8″. Yukon 4340 Chrome Moly alloy axles offer a strength increase over stock while retaining a low cost. Yukon 4340 Chrome Moly alloy rear axles come with a limited lifetime warranty against manufacturing defects. Please verify bolt pattern on 2011 & later models. This axle has a 3.562″ bolt pattern. Some late model applcaitons use a larger bolt pattern.