“As a customer of some 6+ years I've gotten a chance to know the mechanics and staff fairly well. They're young, experienced and usually know what they're doing. Sometimes their diagnostic computer- like all systems- have "blind spots" and only age and experience can save the day.
Rule of thumb: If you replace the water pump, you change out the thermostat at the same time or vice versa because if one goes the other is close to going too. That's a little trick none of the boys had been taught in school, nor by experience. Needless to say they were surprised when I had both replaced- saved money on the hourly rate- and imagine their surprise when they discovered the pump shaft had broke.
I'm old, arthritic, usually as mean as a bear with a sore tooth and have been known to use "colorful metaphors" to make my point.
According to a detailed report, I've spent some $4500 on one specific vehicle; and right now considering having them do an engine and transmission swap at the same time for the same principal- you've got it open, fix it while it's open. Yeah, this is going to cost some serious money- more than the jeeps worth. But compared to a NEW Jeep Grand Cherokee,,,,,its about 20%.”