Notes: Drum Brake Adjusting Screw Assembly. 1971 GMC G25/G2500 Van Front: Drum. 1974 GMC G25/G2500 Van. 1967-1973 GMC G25/G2500 Van. 1967-1970 GMC G25/G2500 Van. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.