300 seems high as hell, whys it so far up there if i could get a lot more expensive car for less than that?
lease<simplified> = agreed upon price + taxes/delivery/etc - estimated residual value at the end of the lease + amortized interest rolled into the loan.
The lease could be higher if the interest rate is higher (GM is keeping the interest high on the SS leases, probably not so high on the G6), or if the residual value is expected to be lower. (or both).
GM probably expects the resale value to drop more on the Cobalt SS than on the G6 (even though the G6 is more expensive). I am sure they have done the research and it shows that the Cobalt will not hold its value as well or take more money to get it in shape to resell.
Say the G6 loses 40% of its value in 4 years (typical); That means the residual price would be 29K x .6 or $17400. That means 29-17.4 or $11.6K is the amount you are financing for the 4 years.
the Cobalt ends up being $24K and, using the 40% rule, it is worth $14400. The financed amount is $9.6K
Here is the interest at work; Call it 4% on the G6, payments over 4 years go around $262.
6.5% on the Cobalt ss; ~$228.
Still less, but if GM believes the Cobalt SS will only hold 50% of its value then the payment goes to $285. This assumption is reasonable because cheaper cars tend to lose value more quickly than the pricier ones and a 4 year old SS is probably going to have had a much harder life than a 4 year old G6.
The published GMAC best rates for buyers are 6.5% for the SS and 2.9% for the 4 year G6 loan. If you assume the rates are the same for a lease, then the G6 payment would drop another $10 or so, for a grand total of around $30 a month difference between the two cars.
It does not take much to move a monthly payment up or down a noticable amount.
I hope you get what you desire, but I would strongly urge you to get a written quote from your insurance company before you drop your money down on the vehicle of your choice.