GMC Terrain Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your GMC Terrain and How to Fix Them

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Reviewed by
Aisha
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 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 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.

Troubleshooting Cruise Control Issues in a GMC Terrain

When troubleshooting cruise control issues in your GMC Terrain, it's crucial to adopt a systematic diagnostic approach. Start by checking for any warning lights or error messages on your dashboard, as these can provide immediate clues about the underlying problem. Next, inspect the cruise control sensors for cleanliness; dirt or ice can obstruct their function, leading to malfunctions. Ensure that all electrical connections related to the cruise control system are secure and free from corrosion, as loose or damaged connections can disrupt operation. If these initial checks do not resolve the issue, consider resetting the system by turning off the vehicle overnight, which can sometimes clear temporary glitches. If the problem persists after these steps, it may be time to consult a professional mechanic for a more thorough diagnosis. Addressing cruise control issues promptly is essential for maintaining safe driving conditions, as any malfunction can affect vehicle acceleration and overall driving comfort. By following this structured approach, you can effectively identify and potentially resolve cruise control problems in your GMC Terrain.

What Could Cause Cruise Control Malfunctions in a GMC Terrain?

When dealing with cruise control malfunctions in a GMC Terrain, it's crucial to understand the common problems that may arise. One of the primary culprits is the throttle position sensor, which, if faulty, can cause the engine's computer to misinterpret throttle input, potentially leading to symptoms like excessive black exhaust. Additionally, issues with the control module, sensors, or switches can disrupt the cruise control system's functionality, making it essential to inspect these components for any signs of failure. Throttle actuation problems are also prevalent, as they can prevent the system from maintaining the desired speed. Furthermore, the cruise control switch itself may fail, resulting in either a complete or partial loss of cruise control capabilities. Lastly, while not specific to the GMC Terrain, electrical issues can sometimes interfere with the cruise control system, warranting a thorough check of the vehicle's electrical components. By identifying and addressing these potential problems, DIYers can effectively troubleshoot and resolve cruise control malfunctions in their GMC Terrain.

Why is the Cruise Control Not Working in a GMC Terrain?

When the cruise control in your GMC Terrain is not functioning, it’s essential to address the issue without delay. Ignoring symptoms such as unresponsive controls or erratic behavior can pose significant safety risks, especially during long drives where cruise control is often utilized for comfort and efficiency. Common culprits like a blown fuse, a defective brake pedal switch, or issues with the throttle control system can lead to a complete failure of this feature. Additionally, factors such as obstructed sensors or electrical problems can exacerbate the situation, potentially leading to more severe mechanical issues if left unchecked. By diagnosing and resolving these problems early, you not only ensure the safe operation of your vehicle but also prevent the risk of incurring costly repairs down the line. Therefore, if you notice any signs of malfunction, it’s advisable to consult a qualified mechanic who can accurately identify and rectify the underlying issues, ensuring your GMC Terrain’s cruise control operates smoothly and safely.

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