2020 Chevrolet Blazer Tire Pressure Warning Light Stays On

Addressing Tire Pressure Warning Light in 2020 Chevrolet Blazer for Safe Driving

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Reviewed by
Devin Cabugcal
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 2020 Chevrolet Blazer 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 2020 Chevrolet Blazer 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.

Wheels offer very few symptoms, but these symptoms should never be ignored. Visible cracks on the wheels may appear, especially after hitting a large bump, Most often, this will also be accompanied by loss of air from the tire on that wheel. Also, vibration in the steering wheel is very common when the tire is out of balance, and improper wheel nuts or bolts can cause creaking and popping noises to develop. Again, there are very few symptoms, but they should not be ignored.

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 steps should I take to diagnose the tire pressure warning light issue in my 2020 Chevrolet Blazer?

To effectively diagnose the tire pressure warning light issue in your 2020 Chevrolet Blazer, begin with a thorough check of the tire pressure in all four tires using a reliable tire pressure gauge. Ensure that the readings align with the recommended PSI specified in your owner's manual or on the sticker located on the driver's side door jamb. Next, conduct a visual inspection of each tire for any signs of damage, such as punctures, cuts, or bulges, and look for any foreign objects that may be lodged in the tread. If the tire pressure is correct and no visible issues are found, the next step is to reset the tire pressure monitoring system (TPMS), which can often resolve minor glitches. Refer to your owner's manual for specific instructions on how to perform this reset. However, if the warning light persists despite these efforts, it may indicate a more complex issue, and it would be prudent to consult a mechanic or dealership for a professional diagnosis and potential sensor replacement. By following this systematic approach, you can efficiently address the tire pressure warning light concern in your vehicle.

What could be causing the tire pressure warning light to stay on in a 2020 Chevrolet Blazer?

When the tire pressure warning light stays illuminated in a 2020 Chevrolet Blazer, it signals potential issues that need to be addressed promptly. The most common reason for this warning is low tire pressure, which can occur due to punctures, leaks, or simply the natural loss of air over time. Regularly checking the tire pressure in all four tires is crucial to ensure they are properly inflated. Another possibility is a faulty tire pressure sensor; if the sensor is malfunctioning, it may not provide accurate readings, resulting in the warning light remaining on. Additionally, sensor calibration issues can occur, requiring recalibration to ensure the sensors are functioning correctly. Electrical or wiring problems within the tire pressure monitoring system can also lead to communication disruptions between the sensors and the vehicle's computer, causing the warning light to activate. Lastly, a malfunctioning control module may misinterpret the data from the sensors, unnecessarily triggering the warning light. To troubleshoot these issues, begin by checking the tire pressure, inspecting the sensors for any visible damage, recalibrating the sensors if necessary, and examining the vehicle's electrical system for faults. If the warning light continues to persist after these checks, it is advisable to consult a professional mechanic for a comprehensive diagnosis and repair.

What should I do if the tire pressure warning light on my 2020 Chevrolet Blazer stays on?

When the tire pressure warning light on your 2020 Chevrolet Blazer stays illuminated, it is essential to act quickly to avoid potential safety hazards and vehicle damage. This warning indicates that one or more tires may be underinflated, which can lead to decreased handling, increased tire wear, and even blowouts. Begin by checking the tire pressure of all tires, including the spare, using a reliable tire pressure gauge. Ensure that each tire is inflated to the recommended levels specified in your owner’s manual or on the sticker located on the driver’s side door jamb. After inflating any underinflated tires, inspect them for visible damage such as punctures or bulges, as these issues can also trigger the warning light. If the tires are in good condition and properly inflated, you may need to reset the tire pressure monitoring system (TPMS) following the instructions in your vehicle’s manual. Should the warning light remain on after these steps, it is crucial to consult a professional mechanic or visit a Chevrolet dealership for further diagnosis. Taking these actions not only ensures your safety on the road but also helps you avoid more significant repairs in the future.

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