Parts Geek - For 1958-1959 GMC 100 Wheel Cylinder Rear Left 41166RPXJ. Notes: Wheel Cylinder -- with 1 in. Cylinder Bore. 1958-1959 GMC 100. Position: Rear Left. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.