There's no way to tell what will be in the mind of someone looking to buy it used but personally I wouldn't have any issue with a replaced transmission, especially so early in the car's life. I don't think an informed buyer would have a problem either.
One thing to remember, C7's won't be rare by the time you look to sell. Resale value will track pretty much in line with all other mass produced cars and the effect, if any, would be a couple hundred, give or take in the grand scheme of things. I wouldn't let it worry you.
What I would do is pressure Chevy customer service (not the dealer, GM directly) to throw in some perks considering the amount of time the car has been out of service. Maybe an accessory voucher equivalent to one months payment might be considered reasonable compensation.
One thing to remember, C7's won't be rare by the time you look to sell. Resale value will track pretty much in line with all other mass produced cars and the effect, if any, would be a couple hundred, give or take in the grand scheme of things. I wouldn't let it worry you.
What I would do is pressure Chevy customer service (not the dealer, GM directly) to throw in some perks considering the amount of time the car has been out of service. Maybe an accessory voucher equivalent to one months payment might be considered reasonable compensation.