2007 Colorado check engine light reported to tech, and I stated vehicle runs fine with no other issues or signs. Dealer tech reported to me there were error codes 218 and 1574. After about 40 minutes, tech said thermostat was bad and advised replacing it. He R/R thermostat, but I declined brake switch repair. Charged for housing, coolant, and labor a total of 444.94. I drove away, and temp gauge went to high end which had never happened before... ever! I returned vehicle to dealer immediately. After 2 hours wait, I received vehicle and left. No more issues yet . Is this consistent?
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