Availability: 8 in stock
Factory part number 20375991: a multi-purpose plug supplied by GM.
It is catalogued under Covers & Caps > Caps & Plugs. Varies by build: Seals various openings in your vehicle.
A cap that vents and a cap that does not are visually similar, and swapping them gives a fault code or a pressure leak rather than a fit problem.
Dispatched from our US warehouse within one to two business days, with free shipping over $59. Match this against the part you are taking off rather than against a photo. If the number is unreadable, send us the VIN and we will confirm it.
