When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I cleaned my engine yesterday. After I moved the truck there was a black cap with a star type fitting on the bottom side on the ground. The cap is about an inch and a half wide.
Does anybody have a clue as to what this is and where it goes so I can put it back on?