Gm part number for the rear main seal is 12585671 and it list for 15-20 bux.

That is great, if i go to NAPA or Autozone, they want 65-75 bux for the rear main seal. WHY!! Has anyone bought one from them or any other place besides gm,and maybe have a part number i can give them

thanks

Dom

 

Because they are probably including the rear cover gasket with the rear main seal. Some companies are doing this but I can't answer why!