2018 GMC Sierra 3500 HD Tire Pressure Warning Light Stays On

Tire Pressure Warning Light in 2018 GMC Sierra 3500 HD: Causes and Solutions

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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 2018 GMC Sierra 3500 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 2018 GMC Sierra 3500 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.

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 on my 2018 GMC Sierra 3500 HD?

To effectively diagnose the tire pressure warning light issue on your 2018 GMC Sierra 3500 HD, begin with the simplest and most straightforward approach. Start by checking the tire pressure in all tires, including the spare, using a reliable tire pressure gauge. Ensure that each tire is inflated to the recommended levels found in your owner's manual, as incorrect pressure is a common trigger for the warning light. Next, visually inspect each tire for any signs of damage such as punctures, cuts, or bulges, and look for uneven wear patterns that could suggest alignment problems. If the tire pressures are correct and the tires appear undamaged, proceed to reset the tire pressure monitoring system (TPMS) as outlined in your manual, which can sometimes resolve the issue. If the warning light remains illuminated, the problem may lie with the tire pressure sensors themselves, which could require professional assessment and potential replacement. If you find yourself unable to resolve the issue through these steps, it’s advisable to consult a certified mechanic or dealership for a thorough inspection and repair. By following this diagnostic approach, you can systematically address the tire pressure warning light and ensure your vehicle's safety and performance.

What could be causing the tire pressure warning light to stay on in a 2018 GMC Sierra 3500 HD?

When the tire pressure warning light remains illuminated in your 2018 GMC Sierra 3500 HD, it can be a source of frustration, but understanding the common problems can help you diagnose the issue. One of the primary culprits is low tire pressure, which is easily checked with a tire pressure gauge. Ensure all tires are inflated to the manufacturer's recommended levels, as even a slight drop can trigger the warning light. If the pressure is adequate, consider the possibility of a faulty tire pressure sensor; these sensors can wear out over time and may need replacement. Additionally, sensor calibration issues can arise, particularly if tires have been rotated or replaced, necessitating a recalibration to ensure accurate readings. Electrical faults within the tire pressure monitoring system (TPMS) can also cause the light to stay on, so inspecting the wiring and connections for any signs of damage is crucial. Lastly, if all else fails, the TPMS itself may be malfunctioning, which could require professional diagnostic testing to identify and resolve the underlying problem. By systematically addressing these potential issues, you can effectively troubleshoot the persistent tire pressure warning light and ensure your vehicle remains safe and roadworthy.

What immediate actions should be taken if the tire pressure warning light remains on in a 2018 GMC Sierra 3500 HD?

When the tire pressure warning light remains illuminated in your 2018 GMC Sierra 3500 HD, it is crucial to act promptly to ensure your safety and the vehicle's performance. Ignoring this warning can lead to serious consequences, including tire blowouts or diminished handling, which can compromise your control on the road. Start by checking the tire pressure in all tires with a reliable gauge, as underinflation is a common cause of the warning light. If you discover any tires are low, fill them to the recommended levels to avoid potential hazards. Additionally, inspect each tire for visible damage, such as punctures or bulges, which could exacerbate the issue. Once you have adjusted the tire pressures, reset the tire pressure monitoring system to ensure it accurately reflects the changes. If the warning light persists despite these efforts, it is essential to consult a professional mechanic, as there may be underlying issues with the monitoring system that require expert attention. Taking these steps not only enhances your safety but also helps maintain the longevity and reliability of your vehicle.

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