2006 Chevrolet Trailblazer EXT Cruise Control Isn't Working

Fixing Cruise Control Malfunctions in 2006 Chevrolet Trailblazer EXT

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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 Chevrolet Trailblazer EXT 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 Chevrolet Trailblazer EXT 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 initial diagnostic steps to troubleshoot the non-functional cruise control in a 2006 Chevrolet Trailblazer EXT?

When troubleshooting the non-functional cruise control in a 2006 Chevrolet Trailblazer EXT, it's essential to adopt a systematic diagnostic approach. Begin by checking the fuse associated with the cruise control system, as a blown fuse is a straightforward issue that can easily be resolved. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational, as faulty buttons can prevent engagement. Following this, verify the speed sensor's functionality, since it is critical for the cruise control system to operate correctly. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues. Additionally, examine the vacuum lines for leaks, as these can disrupt the system's performance. Finally, inspect the brake and clutch switches to confirm they are functioning properly, as these components are designed to disengage the cruise control when activated. By following this structured approach, you can effectively identify and address the root cause of the cruise control malfunction in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2006 Chevrolet Trailblazer EXT?

When troubleshooting the cruise control system in a 2006 Chevrolet Trailblazer EXT, it's essential to understand the common problems that may lead to its failure. One of the primary issues could be a faulty brake light switch, which is crucial for the cruise control's operation; if this switch malfunctions, it may prevent the system from engaging when the brake pedal is pressed. Additionally, a blown fuse in the vehicle's fuse box can disrupt the electrical flow necessary for the cruise control to function properly. 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 significantly impact the cruise control's performance, leading to unexpected disengagements. Lastly, a malfunctioning cruise control module itself can be the root cause, as it controls the overall operation of the system. If you encounter issues with your cruise control, it's advisable to systematically check these components to identify and resolve the problem effectively.

How urgent is it to address the non-functioning cruise control in a 2006 Chevrolet Trailblazer EXT?

Addressing the non-functioning cruise control in a 2006 Chevrolet Trailblazer EXT should not be overlooked, even if it may not seem as urgent as critical safety issues like brakes or airbags. Cruise control enhances driving comfort, particularly on long journeys, by allowing drivers to maintain a steady speed without constant pedal pressure. A malfunctioning system can stem from relatively simple issues such as blown fuses or faulty switches, which are often easy and inexpensive to fix. However, neglecting this problem can lead to increased driver fatigue during extended trips, as the driver must remain more engaged in speed management. While the immediate safety risks may be minimal, the overall convenience and functionality of your vehicle are compromised, making it advisable to address the issue promptly to restore the full benefits of this helpful feature.

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