2006 Buick Terraza Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2006 Buick Terraza 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
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2006 Buick Terraza 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 Buick Terraza 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.

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 2006 Buick Terraza?

To effectively diagnose cruise control issues in your 2006 Buick Terraza, start by checking the fuses associated with the cruise control system, as a blown fuse can easily disrupt functionality. Next, inspect the brake pedal and throttle body for any signs of wear or malfunction, since these components play a crucial role in the operation of cruise control. If the check engine light is illuminated, it’s essential to use an OBD2 scan tool to identify any underlying issues that may be affecting the cruise control system. Understanding the specific reasons for the cruise control failure will help you target your repairs more efficiently. Once you’ve ensured that all systems are functioning correctly, test the cruise control by accelerating to at least 25 mph and engaging the cruise control lever to see if it resumes the preset speed. By following this methodical approach, you can diagnose and potentially resolve the cruise control issues, enhancing your driving experience.

What are the common problems that could cause the cruise control to stop working in a 2006 Buick Terraza?

When dealing with a malfunctioning cruise control system in a 2006 Buick Terraza, it's essential to understand the 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 is defective, it may prevent the system from engaging altogether. Another potential issue is a defective speed sensor; this component is vital for maintaining a constant speed, and if it fails, the cruise control will not function correctly. Additionally, a blown fuse in the vehicle's electrical system can disrupt the cruise control operation, so checking the fuses is a straightforward first step. Vacuum leaks in the engine can also impact the cruise control system, as they disrupt the necessary vacuum pressure for its operation. Lastly, a malfunctioning cruise control module can be the root cause of the problem, as it controls the entire system's functionality. By systematically checking these components, you can effectively troubleshoot and potentially resolve the cruise control issues in your Buick Terraza.

How urgent is it to address the non-functioning cruise control in a 2006 Buick Terraza?

Addressing a non-functioning cruise control in a 2006 Buick Terraza is important, even if it may not seem like an immediate emergency. While the absence of this feature does not compromise the vehicle's ability to stop or steer, it can lead to increased driver fatigue during long trips and may negatively impact fuel efficiency. More critically, a malfunctioning cruise control system could signal deeper issues within the vehicle's electronic or mechanical systems, which, if left unchecked, might escalate into more serious problems that could affect overall vehicle performance and safety. For DIY enthusiasts, it is advisable to conduct a thorough inspection of the cruise control components, including the fuses, wiring, and control switches, to identify any visible issues. However, for a comprehensive diagnosis and repair, consulting a qualified mechanic or dealership is recommended to ensure that the vehicle remains safe and reliable on the road. Taking prompt action not only enhances driving comfort but also helps prevent potential accidents or costly repairs down the line.

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