2019 GMC Terrain Cruise Control Isn't Working

Troubleshooting Common Issues with Cruise Control in Your 2019 GMC Terrain and How to Fix Them

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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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2019 GMC Terrain 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 2019 GMC Terrain 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 2019 GMC Terrain?

To effectively diagnose a cruise control issue in a 2019 GMC Terrain, 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 or damaged fuse can disrupt the system's functionality. Next, examine the cruise control buttons on the steering wheel to ensure they are not stuck or damaged, which could prevent proper engagement. Utilizing an OBD-II scanner to check for error codes is a crucial step, as it can reveal specific issues affecting the cruise control system. Additionally, inspect the vehicle's speed sensors, which are vital for the cruise control to operate correctly. Testing the brake pedal switch is also essential, as it must function properly to allow the cruise control to engage and disengage safely. Finally, take a close look at the wiring and connections associated with the cruise control system for any signs of damage or corrosion. If these steps do not resolve the issue, it may be time to consult a professional mechanic for further assistance. This methodical approach not only helps in identifying the problem but also ensures that you cover all potential causes efficiently.

What are the common problems that could cause the cruise control to stop working in a 2019 GMC Terrain?

When troubleshooting cruise control issues in a 2019 GMC Terrain, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty brake pedal switch, which is crucial for disengaging the cruise control when the brake is applied; if this switch malfunctions, it can prevent the system from engaging properly. Additionally, speed sensor issues can arise, as the cruise control system relies on accurate speed readings to function effectively. A blown fuse in the vehicle's electrical system can also disrupt cruise control operations, leading to unexpected failures. Furthermore, a malfunctioning throttle actuator can hinder the system's ability to maintain a set speed, while a defective cruise control module may be the root cause of the problem. By identifying and addressing these potential issues, you can effectively troubleshoot and restore the cruise control functionality in your GMC Terrain.

How urgent is it to address the malfunctioning cruise control in a 2019 GMC Terrain?

When it comes to a malfunctioning cruise control system in a 2019 GMC Terrain, the urgency of addressing the issue cannot be overstated. A faulty cruise control can lead to unexpected acceleration or deceleration, creating a significant safety hazard for both the driver and other road users. Ignoring these symptoms not only increases the risk of accidents but can also result in more extensive damage to the vehicle's systems, leading to costly repairs that could have been avoided with timely intervention. Therefore, it is crucial to have the cruise control system inspected and repaired by a qualified mechanic or dealership as soon as possible. This proactive approach ensures the vehicle operates safely and efficiently, allowing for peace of mind while driving.

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2019 GMC Terrain Cruise Control Issues & Repairs | RepairPal