You may have seen GM's recent commercials touting their "60-day satisfaction guarantee" on all new vehicles. It seems that the stunt has been successful. Last week GM spokesperson Tom Henderson told the AP that only 15 cars had been returned. Now the company says they are extending the offer to Jan. 4, 2010.

If you're interested in the deal, here's how it works: You get 60-days to evaluate the car. If you don't like it, you can return it and get the purchase price and the sales tax back. You have to keep the car for at least 30 days, and if you do more than $200 worth of damage to it — or put more than 4,000 miles on it — you no longer qualify.

There are a few more limitations and whatnot — and in all it's pretty clear that returning a car is a hassle. You'll be stuck with the fees from licensing, titling or registration, insurance, dealer installed accessories, aftermarket products or add-on equipment (other than factory options ordered with the vehicle), dealer fees, ancillary products including extended warranties or service contracts, finance charges, etc, etc.

If you're sure you want to buy a GM and don't want this guarantee — you get a $500 cash incentive for opting out— which may just be a better deal than the return policy.

60 Day Satisfaction Guarantee FAQ [GM]
GM Extends Vehicle Refund Program Until January [NYT]