This genuine GM oil filler cap is designed for use with 0W-20 oil and is the perfect replacement part for your Silverado or Sierra. Made by ACDelco, this OE part number 12667313 cap comes in classic black and includes a seal to ensure a tight fit. Designed to meet the high standards of GM, this oil filler cap is sure to provide reliable performance and a secure fit. Upgrade your engine with this top-quality cap, ideal for use in various GM vehicles.