Gm offers the GMS price to employees, which is just under 35K for a 41K sticker. That is before the current incentives, so plan on taking another 4-5K off that. The dealers invoice price is 3% above the GMS price, which reflects the 3% kickback the dealer gets for selling the vehicle.
If you were a GM employee, you could walk out for at least $10K less than the sticker price.