I've not heard of an "Acacia". I think that's the GMC Acadia. If you search for GMC Acacia, there's no such record of. Must have heard or read it wrong somewhere.
It turned out the information I was given had the model misspelled. When I had done the Google searches some referred to an acacia but when read it was the Acadia. The model not being in GMC's product line was also odd. All is well.