I recently bought an 02 GMC Yukon Xl Denali. The front two seats won't heat up. When I press the heater button for either seat it will light up for high and low, but the seats never appear to turn on. I have checked all the fuses in the engine bay and buy the drivers door, even the unrelated ones. Also I checked the connectors under the seats and they are still plugged in. Any thoughts?
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