2021 Chevrolet Silverado 2500 HD Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2021 Chevrolet Silverado 2500 HD

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2021 Chevrolet Silverado 2500 HD cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
  • Control Module: A faulty control module can lead to erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
  • Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent throttle response.
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 Chevrolet Silverado 2500 HD cruise control isn't working?

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 the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.

In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

What are the steps to diagnose the cruise control issue in a 2021 Chevrolet Silverado 2500 HD?

To effectively diagnose a cruise control issue in a 2021 Chevrolet Silverado 2500 HD, it is essential to adopt a systematic diagnostic approach that begins with simpler checks and progresses to more complex assessments. Start by inspecting the cruise control fuse, as a blown fuse is often the most straightforward explanation for a malfunction. Next, examine the cruise control buttons on the steering wheel to ensure they are functioning properly and are not stuck or damaged. If these initial checks do not reveal the problem, utilize an OBD-II scanner to identify any error codes that may provide insight into specific issues within the cruise control system. Following this, test the cruise control module to confirm it is sending the correct signals. Additionally, check the vehicle speed sensor, as its proper functioning is crucial for the cruise control to operate effectively. Finally, inspect all wiring and connections associated with the cruise control system for any signs of damage or corrosion. By following this structured diagnostic approach, you can efficiently identify and address the root cause of the cruise control issue in your Silverado, ensuring a smoother driving experience.

What are the common problems that could cause the cruise control to stop working in a 2021 Chevrolet Silverado 2500 HD?

When troubleshooting cruise control issues in a 2021 Chevrolet Silverado 2500 HD, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty brake light switch, which can prevent the cruise control from engaging since the system is designed to disengage when the brake pedal is pressed. Additionally, issues with the speed sensor can disrupt the cruise control's functionality, as it relies on accurate speed readings to operate effectively. A blown fuse in the cruise control system is another potential issue; checking and replacing any blown fuses can often restore functionality. If the cruise control module itself is malfunctioning, it may require repair or replacement. Furthermore, problems with the throttle control system, such as a faulty throttle position sensor, can hinder the cruise control's ability to maintain speed. Lastly, electrical problems, including damaged or corroded wiring connections, can interfere with the communication between components, leading to system failure. By systematically addressing these common issues, you can effectively troubleshoot and potentially resolve the cruise control problems in your Silverado.

How urgent is it to address the non-functioning cruise control in a 2021 Chevrolet Silverado 2500 HD?

Addressing the non-functioning cruise control in a 2021 Chevrolet Silverado 2500 HD should be considered a priority, even if it may not seem like an immediate safety concern. Cruise control enhances the driving experience by allowing drivers to maintain a consistent speed, which is particularly beneficial during long trips or highway driving. When this feature fails, it can lead to frustration and discomfort, especially on extended journeys where the convenience of cruise control is most appreciated. Moreover, neglecting this issue could potentially mask underlying mechanical or electrical problems that may worsen over time, leading to more significant and costly repairs. Therefore, while it may not pose an immediate threat to safety, addressing the non-functioning cruise control promptly is advisable to ensure a smoother driving experience and to mitigate the risk of further complications down the road.

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