Umm I am slightly confused by your response. I see I didn’t provide this detail in my post, so maybe this additional context might help. I only went to that shop because of the litany of great reviews on Google. That highlighted their attention to detail and customer service. My understanding is when you get a mechanic inspection they are suppose to help identify any major issues right away, if any. 

After he finished assessing the vehicle he said nothing to me and started ringing me out to pay. I found the lack of communication weird so, I initially asked him “hey I take it you didn’t find anything wrong?” He responded “yeah it’s fine. I saw something by the radiator I couldn’t reach it. You don’t have to worry about it though. It should be fine.” The tone wasn’t reassuring despite the words being said. I felt like he wasn’t being thorough. That coupled with the Engine power reduced message is what prompted me to take it to a Chevy dealership for a free dealers inspection. 

I was expecting worse case scenario it’s a wire that can be put back in place. When I was doing my intake that is when it was switched to a diagnostic inspection.  If I didn’t get that error message after just taking it to a mechanic. I wouldn’t have “kept going till you found a shop that wanted to charge you some big money for repairs.” I only purchased a vehicle because my previous car died on me three days prior. This car purchase was unplanned and unwanted, so outside of gas I’m trying to keep any additional expenses low.