I've been eyeing a certain 07 Megacab with 4300 miles on it, price was $37,990 2 months ago, they called monday and said they are bringing it down to $27990. Banker says that GM and Chrysler are talking "merge" and he would suggest waiting this out for a few months and see what the market does, "there could be some really good buys out there".
I'd go in now and haggle with them. I think the market for big trucks, diesels especially is about at bottom now. Paid $30k for a '07 Mega with 10k mi in May (truck has about $5k in functional extras as well), and I haven't seen too many deals much better than that all summer.
And if GM &DC do merge and drop the Mega, it won't make their value go down....IMO.