I have taken my vehicle to the service dept here several times. Overall my vehicle issues have been taken care of acceptably. However, some things seem to fall thru the cracks with this service dept.
One time I had made an appointment to have a recall item fixed. When I showed up for the appointment 3 days later, they no longer had the parts on hand to fix it. No call ahead of time saying not to come, or no holding of my parts back to make sure they could do the repair. C'mon guys you can do better.
On a separate occasion, I took my vehicle in for a warranty issue repair. This was right after swapping wheels and tires from winter set to summer set. The tire pressure monitors, of course, have to be reset after this is done. A procedure that takes the tech all of 5 minutes to do. They had my vehicle half a day, drove it several times, all the while with the big TPM light and message on the dash lit up. Do you think they took 5 minutes to reset the TPM to provide outstanding customer service? NOPE!
Again, c'mon guys, really?
Took the vehicle to the local Discount Tire, they reset the TPM in 5 minutes, no appointment, no fuss, for free.
So there you have it, an entirely average GM service dealership. No HUGE complaints, but certainly wouldn't call them outstanding by a long shot.