2012 GMC Terrain Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2012 GMC Terrain and How to Fix Them

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Reviewed by
Devin Cabugcal
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 2012 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 2012 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.

What are the steps to diagnose the cruise control issue in a 2012 GMC Terrain?

To effectively diagnose a cruise control issue in a 2012 GMC Terrain, it's essential to adopt a systematic approach that begins with the simplest potential problems before progressing to more complex 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 operational, since faulty buttons can lead to malfunctions. Utilizing an OBD-II scanner to scan for error codes is a crucial step, as these codes can pinpoint specific issues within the cruise control system. Following this, examine the speed sensors, as any faults here can prevent the cruise control from maintaining speed. It's also important to inspect the wiring and connections for any signs of damage or corrosion, as these can significantly impact system performance. Finally, test the cruise control module to confirm its proper functioning. If these steps do not resolve the issue, consulting a professional mechanic with experience in GMC Terrain systems may be necessary to ensure a thorough diagnosis and repair. By following this structured diagnostic approach, you can efficiently 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 2012 GMC Terrain?

When troubleshooting cruise control issues in a 2012 GMC Terrain, it's essential to consider several common problems that could be at play. One of the primary culprits 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, the vehicle's speed sensor plays a vital role in cruise control functionality; if it fails to provide accurate speed readings, the system may not operate as intended. Another potential issue is a blown fuse related to the cruise control system, which can easily be checked and replaced if necessary. Furthermore, the cruise control module itself may be faulty, requiring repair or replacement to restore functionality. Lastly, electrical problems, such as loose connections or damaged wiring, can disrupt the cruise control system. By systematically addressing these common issues, you can effectively troubleshoot and potentially resolve the cruise control problems in your GMC Terrain.

How urgent is it to address the non-functioning cruise control in a 2012 GMC Terrain?

When dealing with a non-functioning cruise control in a 2012 GMC Terrain, understanding the urgency of the situation is crucial for both safety and vehicle performance. While a malfunctioning cruise control system may seem like a minor inconvenience, especially on long drives where it can alleviate driver fatigue, the underlying cause of the issue can significantly influence how quickly it should be addressed. If the problem stems from something relatively benign, such as a blown fuse or a faulty brake light switch, the immediate safety risk may be low, but neglecting these issues can lead to further complications down the line. Conversely, if the malfunction is indicative of a more serious engine-related problem, it could pose a significant safety hazard and may require urgent attention to prevent potential damage to the vehicle. Therefore, it is advisable for DIY enthusiasts to diagnose the issue promptly and take appropriate action, ensuring that the cruise control system functions correctly and maintaining the overall safety and performance of the GMC Terrain.

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