Dealer Change The Deal Days After You Already Took It Home?

[Bully13]

This does not sound shady to me at all. There is a contingency. The dealer writes up a contract for an interest rate based on your credit, and then hopes to get you approved by a bank. Most likley what has happened is the rate was not bought at the percentage that the dealer wrote the contract up as.

So the dealer wants you to sign a new contract based on a higher rate: the rate they could get a bank to buy it for.

What you can do is say, "No thanks!" and walk away from the vehicle. Of course then you may have a harder time getting the same deal or better.