Primasing Motors Inc

I have had all my vehicles serviced here for 10 years. The Service Department had always been fair and friendly.
This year, 2015, there was a total overturn in service staff that has made what was once a business I trusted into one that I don’t trust.
I took my Chevy Car in for an oil change and the technician put 10 pounds of extra pressure in my tires, almost burst them. I got an email from Onstar and quickly went to my local gas station to remove the extra air. I reported this to the Service Manager, Brian.
Then I took my Chevy truck in for an oil change and they forgot to put the sticker in the window, and did not see that I had a headlight out. I had to make a second trip in to rectify this. It was the same guy that worked on my car.
I am concerned that he does not know what he is doing and could do something wrong that would cost me a lot!
The Service Engine soon light came on in my truck and that is the Emissions light. I called Brian and scheduled an Emissions inspection. When I arrived I went into the waiting room. Another customer came in and turned up the TV very loud watching soaps so I went back out to the showroom.
My truck had not moved from where I parked it. It did not go in the shop at all! Then the service writer told me that I had a ‘transmission problem’ and would have to bring my truck back in for extensive tear down and repair. How do they know? They did not drive it or put it on a rack. There were and are no leaks. Transmission drives fine.
They did not tell me the truth. I did my homework and found out that they work on commission and try to make work for themselves, especially with women who might not ‘know’. I called Brian, the service manager and told him about this.
I am afraid to take my vehicles there as they might intentionally do something to them to break them.
The Service writers are new there and apparently that is their style. I don’t like it. Will be shopping around for a new repair facility.
Do your homework and don’t ok any thing without a second opinion from another shop!