2015 GMC Sierra 3500 HD Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2015 GMC Sierra 3500 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 2015 GMC Sierra 3500 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 2015 GMC Sierra 3500 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 2015 GMC Sierra 3500 HD?

To effectively diagnose a cruise control issue in your 2015 GMC Sierra 3500 HD, begin with the simplest solutions before progressing to more intricate diagnostics. Start by checking the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, inspect the cruise control buttons on the steering wheel to ensure they are not stuck or damaged, as this can prevent proper engagement. Utilizing a diagnostic scanner to check for error codes can provide insight into any underlying issues that may not be immediately visible. Additionally, examine the speed sensors, as they are critical for the cruise control system's operation; faulty sensors can lead to erratic behavior. It's also important to inspect the wiring connections for any signs of damage or corrosion, which could impede the system's performance. Finally, test the cruise control module itself to determine if it is functioning correctly. If these steps do not resolve the issue, seeking assistance from a professional mechanic may be necessary to ensure a thorough diagnosis and repair. By following this structured approach, you can systematically identify and address the cruise control problem in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2015 GMC Sierra 3500 HD?

When diagnosing cruise control issues in a 2015 GMC Sierra 3500 HD, it's essential to consider several common problems that could be at play. One of the primary culprits is a failed control module, sensor, or switch, which can disrupt the communication necessary for the cruise control to function properly. Additionally, throttle actuation problems can significantly impact the system, as any malfunction in this area may prevent the cruise control from maintaining speed. Another critical factor to examine is the front hubs and wheel speed sensors; if these components are not functioning correctly, they can lead to the cruise control cutting out unexpectedly. By systematically checking these areas, DIYers can effectively identify and address the root cause of the cruise control malfunction, ensuring a smoother driving experience.

How urgent is it to address the non-functioning cruise control in a 2015 GMC Sierra 3500 HD?

Addressing a non-functioning cruise control in your 2015 GMC Sierra 3500 HD should be a priority, as neglecting this issue can lead to significant safety risks and further mechanical complications. Cruise control is not just a luxury; it plays a crucial role in maintaining a steady speed, which is particularly beneficial during long drives. A malfunctioning system may indicate deeper problems within the vehicle's electrical components or sensors, which could escalate if left unchecked. For DIY enthusiasts, it’s essential to recognize that while the issue may not seem urgent, the potential for increased driver fatigue and reduced fuel efficiency makes it imperative to investigate the root cause promptly. By taking the initiative to inspect the cruise control system, you can ensure your vehicle remains safe and efficient on the road, ultimately preventing more costly repairs down the line.

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Diagnose Cruise Control Issues in 2015 GMC Sierra 3500 HD