You can, but the real question is what will they tell you.. I just got $4000 worth of incentives ($2500, $500 military, $1000 for business owner) off of mine without even trying.
One thing you may want to do is become a member of www.treadlightly.org Chrysler is a partner with them. That will get you 1% below invoice price. You must be a member for over 30 days before the that incentive will kick in. It costs $60 to joint TL.
You can do anything you want. Remember that it is your money that you need to spend to buy the truck but it is the dealer's truck to give you for the money. If the deal doesn't make sense on either side, it won't happen.