The rumor on the street is that the automakers are preparing for an epic strike.
They are stuffing the distribution channels so there will have product to sell.
One of the issues that is coming to a head is the two-tier pay system as the younger employees will soon out-numbering the legacy employees.
In very round numbers, the base pay of the legacy employees is $30 an hour.
In very round numbers, the base pay rate for those hired after September 2007 is half that.
When the number "tips", look for the younger employees to make the consolidation of the two tiers a "demand" and that the new base pay rate be something like $23/hour for all employees regardless of hire date.
Look for the Big Three to try to stiff the demand. Why should they ratchet the pay of younger employees when they are quickly replacing the $30/hour group? That would defeat the purpose of the lower rate.
For the sake of reference, a typical "factory" job in a local non-Big Three factory runs about $12 an hour. The $15/hour represents a 25% premium over that $12/hour. Expect the companies to invite the workers to leave if they think they can do better elsewhere. Of course they won't.