In Canada it seems that all GM (AC Delco) parts can only be got at the dealership? For example looking in the owners manual it specifies that PS fluid part no. as 89021186 (in US it is 89021184). If I go to Part Source or CT will it list such a part no on the container (something to the effect of "...meeting the standards of GM....")? Or maybe I will just have to wait for the dealership to open Monday?