NM51 -
The only problem with the web sites you reference is that they are Ford based web sites.

We are discussing T-5 transmissions from GMC vehicles. I have no idea what the difference is (duh!), but the GMC Manuals and dealers say use Dextron II ATF. I think it's pretty clear. No way will I use oil! It's Dextron II for GMC T-5's.
Joe
