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Some kind of shim, looks like. Rubber to give the damper a little axial play for some reason GM must have thought was important.
Not a seal, since there's no signs of wear or any fluid leak-by.
Compare old to new to see if there's a dimensional difference in the height of this mounting flange. If there isn't a delta, re-use the OEM part.
Not a seal, since there's no signs of wear or any fluid leak-by.
Compare old to new to see if there's a dimensional difference in the height of this mounting flange. If there isn't a delta, re-use the OEM part.
