Edit: I called in January 2018 to ask if they had records stating that they replaced the transmission fluid.
Below is background information:
I purchased a 2008 Pontiac Grand Prix in 2016. This set me back a little over $8k. They assured me it had been serviced and everything was great. In August, I got the check oil light. That's odd, considering I wasn't even close to having 5000 miles on (what I thought was) a fresh oil change.
December rolled around... I noticed the car wouldn't heat up. Turns out the thermostat was rusted open. That's another fix. While it was being fixed, my boyfriend checked the anti-freeze. It was a solid brown.
This January, a year and a half later, my transmission was slipping. I took it to a mechanic and it turned out I needed a new filter. So I got that put in and then my transmission started slipping again. The transmission pump burned out.
It's suggested you change the transmission fluid every 60k miles or so. I got the car with 93k miles. At the time of the transmission slip, I had 110,000 miles. If the car had been serviced like I was told, I shouldn't have had this problem.
Chad was friendly enough... but this car wasn't worth what I paid for it.