We don't have full details on the promotion yet, but starting Wednesday, it'll be a good time to head over to any GM showroom: The automaker's gone ahead and doubled down with employee pricing for everyone yet again. The new sale will include all eight brands and run from Wednesday, August 20 through September 2. Presumably, there will be the usual exclusions, but expect anything with any significant inventory on the ground to be in the mix, since the General is trying to clear lots for 2009 vehicles. [Automotive News; Sub. Req.]