There's a better way. The original cap is yellow with black markings and is held in place with a ring that secures it to the bottle. Now I know you Mopar guys and gals have this thing about matching numbers and I'm one, but if you can tolerate a black cap with yellow markings, this cap will do the same job the old did. I got mine at O'Reilly's, but you might be able to look this number up. It's made by Doorman for GM vehicles 1982-2007 and fits this bottle perfectly other than the color. The part number is 54100 and costs about $7.00, which is a helluva lot cheaper than the dealer and a lot easier to find. It is also the same one our Torrent uses. Maranatha!