Does this part have a raised part number on the outer surface and if so what is it. Some people sell a 382156-S and claim it to be NOS GM for this application; however, my research says this may be a vendor part number and that it was used on Fords for PCV fitting attachement to the valve cover.....but it may have been used in many applications.
C2 C3 Brake Booster Check Valve Grommet
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