2021 GMC Yukon Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2021 GMC Yukon: Causes and Solutions

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Tire Leaking Air
0%
30% chance it's the
Wheel Leaking Air
0%
15% chance it's the
Tire Pressure Monitoring System
0%
15% chance it's
Something else
The most common reasons a 2021 GMC Yukon tire pressure warning light stays on are a leaking tire, a wheel that no longer holds air, or a faulty tire pressure monitoring system.
  • Tire Leaking Air: A puncture, valve stem issue, or rim damage can cause a tire to leak air, leading to loss of pressure.
  • Wheel Leaking Air: A puncture or damage to the tire or rim can cause air to leak, resulting in a loss of tire pressure.
  • Tire Pressure Monitoring System: A malfunctioning tire pressure monitoring system can be caused by faulty sensors or a dead battery in the sensor units.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2021 GMC Yukon tire pressure warning light stays on?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

When a tire pressure monitoring sensor fails, the tire pressure monitoring system control module will recognize a loss in communication and turn on the warning lamp which indicates the failure. This is most often the case. However, the tire pressure monitoring sensor may also fail by reporting incorrect tire pressures. This could cause a flat tire to go unrecognized, or a properly inflated tire to signal a low or high tire pressure warning.

When a relearn is needed, for any reason, the TPMS warning light will illuminate, and many vehicles will display a message relating to the TPMS system being inoperative or loosing communication. It is important to keep a watchful eye on tire pressures when this system is having issues because there is no warning available for underinflation or overinflation of the tires.

The only symptoms of a TPMS control module failure are failing to alert the driver of underinflation or overinflation of one or more tires, failure to communicate with the body control module or TPMS sensors, or erroneously reporting incorrect tire pressure.

The only symptoms requiring diagnosis for the tire pressure monitoring system warning lamp is if the warning lamp has illuminated while the tires have correct air pressure, or if the air pressure for the tires is out of specification and the warning lamp is off. This is because the overwhelming majority of cases where the TPMS lamp illuminates is due to the change in ambient temperature.

What are the initial steps to diagnose a tire pressure warning light that stays on in a 2021 GMC Yukon?

When faced with a tire pressure warning light that remains illuminated in your 2021 GMC Yukon, the first step is to check the tire pressure in all tires, including the spare, using a reliable tire pressure gauge. Ensuring that each tire is inflated to the manufacturer's recommended PSI is crucial, as incorrect pressure can trigger the warning light. Next, visually inspect each tire for any signs of damage, such as punctures or bulges, which could indicate a leak or other issues that need immediate attention. If the tires appear to be in good condition, consider resetting the tire pressure monitoring system (TPMS) as outlined in your vehicle's manual; this can often resolve minor glitches. After resetting, take your Yukon for a short drive, as this may help recalibrate the TPMS sensors and potentially turn off the warning light. If the light remains on despite these efforts, it may be time to consult a mechanic for a more thorough diagnosis, as persistent issues could indicate a deeper problem within the TPMS or the tires themselves. By following this structured approach, you can effectively troubleshoot the tire pressure warning light and ensure your vehicle is safe and roadworthy.

What could cause the tire pressure warning light to stay on in a 2021 GMC Yukon?

When the tire pressure warning light stays on in a 2021 GMC Yukon, it can signal several underlying issues that DIY enthusiasts can investigate. The most frequent cause is low tire pressure, which may result from natural air loss, punctures, or leaks. To start, check the tire pressure in all four tires and inflate them to the recommended levels found in the vehicle's manual. If the pressure is adequate, consider the possibility of a faulty tire pressure sensor, which can malfunction and provide inaccurate readings, keeping the warning light illuminated. Additionally, the sensors may require recalibration; if they are not calibrated correctly, they can trigger the warning light unnecessarily. Electrical issues, such as wiring problems or blown fuses, can also contribute to this problem. If checking the tire pressure and inspecting for damage do not resolve the issue, try resetting the tire pressure monitoring system as per the manufacturer's instructions. Should the warning light persist after these steps, it is wise to consult a professional mechanic to diagnose and address any deeper issues with the tire pressure monitoring system. By understanding these common problems, you can effectively troubleshoot and potentially resolve the tire pressure warning light concern in your GMC Yukon.

How urgent is it to address the tire pressure warning light that stays on in a 2021 GMC Yukon?

Addressing the tire pressure warning light that remains illuminated in your 2021 GMC Yukon is of utmost importance due to the significant safety risks and potential vehicle damage it poses. When tire pressure is insufficient, it can severely compromise your vehicle's handling and braking capabilities, increasing the likelihood of accidents. Additionally, driving on underinflated tires accelerates uneven wear, which not only shortens the lifespan of your tires but also raises the risk of a blowout while on the road. This situation can lead to costly repairs and replacements, making it a financial burden as well. Furthermore, low tire pressure negatively impacts fuel efficiency, resulting in higher fuel costs over time. Lastly, the Tire Pressure Monitoring System (TPMS) is designed to alert you to these issues, and ignoring the warning light could indicate a malfunction within the system itself. Therefore, it is crucial to promptly check and adjust your tire pressure to ensure your safety, maintain vehicle performance, and avoid unnecessary expenses.

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