Availability: 5 in stock
This is a multi-purpose nut from GM, factory part number 14102542.
Sealing washers on transmission pans, drain plugs and A/C lines are single-use, and reusing one is the usual cause of a leak after a repair.
Check the number on the part you are removing before ordering. If it is worn off, send the VIN and a photo and we will match it.