I have used this business several times over the last 10 years with no problems BUT today.....Where do I start? I called the business last week and spoke with a young lady at the counter. I asked her about a coolant flush for a 2017 Duramax HD diesel. She had to write the info down and ask twice what I had. No problem there. She left and went and asked a person in the shop and returned with a quote of $119. I took it in today and parked right in front of the business with the HD2500 facing the door. I again asked and pointed to the truck outside. Same young lady I had spoken on the phone with and confirmed the price of $119. The price was also on the board behind the cash register. Less than 5 minutes after pulling the truck into the bay, a tech came in and said they may not be able to service it. They could not get the black coolant fill cap off. I walked out there and informed the tech the threads were most likely reversed. I confirmed this when I looked at the yellow lock and unlock markings on the top to the cap. Sure enough the cap came right off. I should have known and just left. When I went to check out, the bill was $140 and change. Seemed a bit high but I figured there was an added shop charge or disposal fee. I paid the bill and got the receipt and it showed $129 charge plus tax. Now $10 is not a problem but it was not what I was told 3 different times. The young lady got the manager and I could tell when he entered the room he was already upset. I explained my stance. He said diesels cost more. I told him not a problem but I had asked 3 different times what the cost was and told $119. He proceeded to get even more irritated/arguementative and said I should have said something before paying. I told him I hadn't seen the bill and didn't know what all I had been charged for. He picked up a business card and wrote down a $10 discount on my next oil change. I told him I don't get my oil changed there. I just wanted the $10 I had been overcharged for. He threw his arms up in the air and said it wasn't his money in a tone that was just short of yelling at me. I asked him what his problem was and he just stormed out. The you lady behind the counter offered to send me a $10 e-payment from her personal account which I declined. She was polite and a mistake was made. There were several different ways this could have been handled. The easiest would have been to cancel the charge and re-run it. The manager position needs to be addressed or at least his attitude. I left my name and number for the owner to call me and left. On the way home the Low Coolant light came on. I pulled over and checked the reservoir and it looked a bit low. I will take care of it myself. In short, it should have been a clue to me when the tech could not get the cap off with a bright yellow pictogram on top. I'm 53 yoa and medically retired. Nobody should be talked to that way. A manager of any business should work to fix things, not elevate them to such a negative contact. Needless to say, I will not return to BLC nor suggest them to anyone else as I have in the past. Trust/respect is gained in drops but lost in buckets.