I sent this question to GM Supplier customer service, they replied back saying you should contact your dealer he will let you know whether you can combine the two or not :angryfire: (If I had to take his words why would I have wasted my time in asking you jack!)
Bottom line is, it really depends on the dealer, I was talking to one a few weeks ago, he didnt have any problem combining the two, but again, he probably knew that there is no way I am going to get the car by the time Conquest expires.
The dealer I am currently working with said no to combining them.
I guess, discounts or not if they really want to sell they will beat all the discounted prices and sell you for even less.
The problem is that most of us are looking for the loaded ones, i.e, CXL and with little extra, they know you wann get them on any terms. When I do local inventory searches I see same base CXs with nothing extra sitting on the lots for weeks.