I was asking the guy about TrueCar and if those are the best pre-negotiated rates. Earlier this year, I purchased a full size Tundra for a family business that was $1500 less with TrueCar than anything else I could negotiate with a dealer. I showed up, wrote the check and drove off.
After asking the GMC dealer about TrueCar, he said that the Costco program is much better. He also mentions that in December and the first part of January, Costco runs a promotion where if you use their program to buy a car you also get a $500 gift card to Costco. He was saying how perplexed he was that Costco didn't advertise that more than they do.