2020 GMC Sierra 2500 HD Tire Pressure Warning Light Stays On

Tire Pressure Warning Light in 2020 GMC Sierra 2500 HD: 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 2020 GMC Sierra 2500 HD 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 GMC Sierra 2500 HD 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 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 2020 GMC Sierra 2500 HD?

When faced with a tire pressure warning light that remains illuminated in your 2020 GMC Sierra 2500 HD, the first step is to manually check the tire pressure in all tires, including the spare. Using a reliable tire pressure gauge, confirm that each tire is inflated to the recommended PSI levels specified by the manufacturer. Next, visually inspect each tire for any signs of damage, such as punctures or bulges, which could indicate a loss of pressure. If the tire pressures are correct and no visible damage is found, attempt to reset the tire pressure monitoring system (TPMS) as this can sometimes clear false alerts. Additionally, examine the TPMS sensors on each tire to ensure they are functioning properly and are not damaged. If the warning light persists, consider using a diagnostic tool to scan for any error codes related to the TPMS, as this can help identify specific issues. Finally, consulting the vehicle's owner's manual can provide further insights into troubleshooting the TPMS system and understanding the warning light's significance. By following these steps, you can effectively diagnose and address the tire pressure warning light issue in your GMC Sierra 2500 HD.

What could cause the tire pressure warning light to remain on in a 2020 GMC Sierra 2500 HD?

When the tire pressure warning light remains illuminated in a 2020 GMC Sierra 2500 HD, it can indicate several underlying issues that a DIY enthusiast can address. The most frequent cause is low tire pressure, which can be easily checked and adjusted using a tire pressure gauge. If the tire pressure is within the recommended range, the problem may stem from a faulty tire pressure sensor that might need replacement. Additionally, the sensors could require recalibration to ensure they are accurately detecting tire pressure levels. It's also important to inspect the electrical components and wiring of the tire pressure monitoring system, as any faults here can trigger the warning light. Lastly, performing a system reset can sometimes clear false alerts, and you can refer to your vehicle's manual for specific reset instructions. By methodically examining these potential issues, you can effectively troubleshoot and resolve the tire pressure warning light problem on your own.

What immediate actions should be taken when the tire pressure warning light stays on in a 2020 GMC Sierra 2500 HD?

When the tire pressure warning light remains illuminated in your 2020 GMC Sierra 2500 HD, it is crucial to act promptly to avoid potential safety hazards and costly repairs. Ignoring this warning can lead to decreased vehicle performance, increased tire wear, and even tire blowouts, which pose serious risks on the road. Start by checking the tire pressure in all four tires with a reliable gauge, ensuring they meet the manufacturer's recommended levels. If you find any tires are underinflated, inflate them accordingly to restore optimal pressure. Additionally, visually inspect each tire for signs of damage, such as punctures or cuts, as these can compromise safety and performance. After addressing any pressure discrepancies or damage, reset the tire pressure monitoring system to clear the warning light. If the light persists despite your efforts, it is essential to consult a qualified mechanic, as there may be a deeper issue with the monitoring system that requires professional intervention. Taking these steps not only enhances your vehicle's safety but also prolongs the life of your tires, making it imperative to respond swiftly to this warning.

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