GM's parts diagrams show a wedge shape spacer in with the mount, like #4 on this -
Will I need to buy that wedge thing, GM 22167000, or will it be in with the mounts depending what I buy? These look slightly different shape than those pictured in Rockauto's mount kits.
They're only about $8/ea so it's an easy order if I need em. Thanks for any input!