Yukon Gear 35.46in 30Spline Inner Left Hand 8.5in 79+ GM Truck & Blazer (4340) / Uses 5-760X U/JointYukon high performance axles are built with high tensile strength 4340 chromoly, use superior production methods that include cold roll formed splines, and feature advanced induction coil heat treating to create an axle of unmatched quality and durability. This Part Fits: Year Make Model Submodel 1988 1991 Chevrolet Blazer Scottsdale 1988 1991 Chevrolet Blazer Silverado 1988 Chevrolet V10 Suburban Scottsdale 1988 Chevrolet V10 Suburban Silverado 1989