2006 GMC Sierra 2500 HD Cruise Control Isn't Working

Fixing Cruise Control Issues in 2006 GMC Sierra 2500 HD

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Reviewed by
Andrew Hajjar
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 2006 GMC Sierra 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 2006 GMC Sierra 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.

What are the steps to diagnose the cruise control issue in a 2006 GMC Sierra 2500 HD?

When diagnosing a cruise control issue in a 2006 GMC Sierra 2500 HD, it's crucial to follow a methodical approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse located in the fuse box, as a blown fuse is a frequent culprit that can easily disrupt the system's operation. Next, examine the cruise control buttons on the steering wheel to ensure they are functioning correctly, since faulty buttons can prevent the system from engaging. Utilizing a diagnostic scanner to retrieve any error codes can also be beneficial, as it helps identify specific problems within the cruise control system. Additionally, check the vacuum lines for any signs of leaks or damage, as these can significantly affect the system's ability to maintain speed. Testing the cruise control module is another important step, as it must effectively send and receive signals for proper functionality. Don't forget to inspect the speed sensors, as issues here can lead to inaccurate speed maintenance. Lastly, ensure that the brake lights are operational, since a malfunctioning brake light switch can disable the cruise control system for safety reasons. By systematically addressing these components, you can effectively diagnose and resolve cruise control issues in your GMC Sierra 2500 HD.

What are the common problems that could cause the cruise control to stop working in a 2006 GMC Sierra 2500 HD?

When troubleshooting the cruise control system in a 2006 GMC Sierra 2500 HD, it's essential to consider several common problems that could be at play. One of the primary culprits is a faulty brake light switch, which is crucial for the cruise control's operation; if this switch malfunctions, it may prevent the system from engaging, as it is designed to deactivate when the brakes are applied. Another potential issue is a defective cruise control module, which can disrupt the system's functionality and lead to complete failure. Additionally, a broken speed sensor can hinder the cruise control's ability to maintain a set speed, causing it to stop working altogether. It's also important to check for a blown fuse in the vehicle's electrical system, as this can interrupt the power supply to the cruise control. Lastly, vacuum leaks within the cruise control system can significantly impact its performance, leading to operational issues. By systematically examining these areas, you can effectively diagnose and address the problems affecting your cruise control system.

How urgent is it to repair the non-functioning cruise control on a 2006 GMC Sierra 2500 HD?

When contemplating the urgency of repairing the non-functioning cruise control on a 2006 GMC Sierra 2500 HD, it's essential to weigh the implications of neglecting this issue. While a malfunctioning cruise control system may not pose an immediate safety risk, it can lead to driver fatigue and distraction during long drives, which can indirectly compromise safety. Additionally, if you frequently embark on highway journeys, the convenience of having a functional cruise control can significantly enhance your driving experience, making it a worthwhile repair. Furthermore, addressing this issue can positively influence the resale value of your vehicle, as potential buyers often look for well-maintained features. Therefore, while the urgency may not be critical, timely repairs can improve your driving comfort and maintain the vehicle's market appeal, making it a prudent decision for any owner.

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