Full Inspection: The Massive 2015 Cadillac Escalade ESV

Photo: Guy Desjardins
A thermal control valve regulates the flow of exhaust gases according to the temperature. If the system hasn’t reached the right temperature for burning gases, the valve will restrict the flow.

Photo: Guy Desjardins
A thermal control valve regulates the flow of exhaust gases according to the temperature. If the system hasn’t reached the right temperature for burning gases, the valve will restrict the flow.

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