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2004 gmc Yukon how do you reset service tire monitor?

There's no single "reset" button for the tire pressure monitoring system (TPMS) on a 2004 GMC Yukon. The system relies on detecting pressure changes in the tires. To reset the system after inflating tires or replacing a sensor, you usually need to drive the vehicle for a period of time (typically 10-20 minutes at speeds above 20 mph). The light should then turn off automatically once the system relearns the correct pressures.

If the light remains on *after* driving, there are a few possibilities:

* Low Tire Pressure: Check the tire pressure in all tires using a reliable gauge and inflate to the correct pressure (found on a sticker inside the driver's side doorjamb).

* Faulty Tire Pressure Sensor: One or more of the TPMS sensors in your tires may be malfunctioning. This is a common issue with older vehicles. A mechanic needs to diagnose and potentially replace the faulty sensor(s).

* Other System Malfunction: There could be a problem with the TPMS system itself. Again, a professional mechanic should be consulted.

In short: Inflate your tires properly, drive for a while, and if the light stays on, see a mechanic. There's no simple "reset" procedure like some newer vehicles have.

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