2006 GMC Sierra 1500 Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2006 GMC Sierra 1500

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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 GMC Sierra 1500 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 GMC Sierra 1500 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 non-functioning cruise control in a 2006 GMC Sierra 1500?

To effectively diagnose the non-functioning cruise control in your 2006 GMC Sierra 1500, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the fuse associated with the cruise control system, as a blown fuse is a common and easily fixable issue. Next, examine the wiring for any visible damage or loose connections, since faulty wiring can disrupt the system's functionality. After ensuring the wiring is intact, test the cruise control switch located on the steering wheel; a malfunctioning switch is often a culprit in cruise control failures. If these initial checks do not resolve the issue, utilize a diagnostic scanner to identify any error codes that may provide insight into the problem. Additionally, inspect the vacuum lines, as older models like the Sierra 1500 may rely on these for proper operation, and any leaks can hinder performance. Finally, assess the cruise control module for signs of damage or corrosion, as a defective module can also lead to system failure. If you still cannot pinpoint the issue after these steps, consulting a mechanic with experience in GMC vehicles is advisable for more thorough diagnostics and repairs. This methodical approach not only helps in identifying the problem efficiently but also saves time and resources in the DIY process.

What are the common problems that could cause the cruise control to stop working in a 2006 GMC Sierra 1500?

When troubleshooting the cruise control system in a 2006 GMC Sierra 1500, it's essential to consider several common problems that could be affecting its functionality. One of the primary issues is a faulty brake light switch, which is crucial for the cruise control to engage; if this switch is malfunctioning, the system may not activate as intended. Additionally, a blown fuse in the vehicle's fuse box can disrupt the electrical flow necessary for the cruise control to operate, so checking the fuses is a good first step. Another potential culprit is a defective speed sensor, which is responsible for relaying the vehicle's speed to the cruise control system; if this sensor fails, the system may struggle to maintain a constant speed. Furthermore, vacuum leaks in the engine can lead to erratic behavior in the cruise control, causing it to disengage unexpectedly. Lastly, a malfunctioning cruise control module itself can prevent the system from engaging or maintaining speed. By systematically examining these components, you can effectively diagnose and potentially resolve the cruise control issues in your GMC Sierra 1500.

How urgent is it to address the malfunctioning cruise control in a 2006 GMC Sierra 1500?

Addressing a malfunctioning cruise control system in a 2006 GMC Sierra 1500 is of utmost urgency due to the significant safety risks it poses. A faulty cruise control can lead to unexpected acceleration or deceleration, which can result in dangerous driving situations, especially on highways where maintaining a steady speed is crucial. Additionally, a malfunctioning system can create discomfort for the driver, detracting from the overall driving experience and making long trips more stressful. Beyond immediate safety and comfort concerns, neglecting this issue can lead to more severe problems within the vehicle's systems, potentially resulting in costly repairs down the line. Therefore, it is essential to prioritize the repair of the cruise control system to ensure safe and enjoyable driving while preventing further damage to your vehicle.

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