Engine Flush - GM Technical Service Bulletin

" find a good independent shop to do your oil changes, no chains"

I’d take a different approach. Find a good shop to do your work in the future, or do it yourself. It doesn’t mater if it is a chain or not, but that it is a good place to get work done. I use a chain place to get oil changes and they do a good job. I check after them every time, and have been doing so for about 10 years. These guys are good. They are unusual among chain oil change stores in that they seem to have only a little turnover, and train their new employees well. All vehicles are checked by a senior employee before they are allowed to leave the work bay. You can find good and bad shops among dealers, indies and chains. If you need a good shop, check with everyone you know and find out who they use and what they think of them. A few will bubble to the top, and you could try them.