I am taking the wife's new Enclave in for the newest software update to improve the transmission shift points and was going to have them do the first oil change. The salesman recommended not waiting until the computer advised, cause it could be as long as 10K miles. He said go ahead and do it around 5-6K. We have ~5500 miles on it. When I called to schedule service, I told the service manager I wanted to go ahead and do the first oil change, but she replied that "GM doesn't recommend it until it needs it, but it is my car and they will do whatever I want".
Any recommendations out there. I always thought it was better to do the first oil change early because it is in theory it is the break-in oil.
Thanks for any advise,