Genuine GM 25850471 Steering Knuckle Genuine Oem:Yes, Category 2:Front Suspension, Superseded Part Number:18079494, Part Ref# On Diagram:ONLY PART REFERENCE #1 ON THE DIAGRAM IS Brand:GM, Fitment Type:Direct Replacement, Other Part Number:18079494, Quantity Needed:1 Manufacturer Part Number:25850471, Category 3:Suspension Components, Item Name:Knuckle, Category 1:Front Suspension