2018 Chevrolet Suburban Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2018 Chevrolet Suburban 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 2018 Chevrolet Suburban 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 2018 Chevrolet Suburban 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.

What steps should I take to diagnose the non-functioning cruise control in my 2018 Chevrolet Suburban?

To effectively diagnose the non-functioning cruise control in your 2018 Chevrolet Suburban, begin with the simplest solutions before progressing to more complex diagnostics. Start by checking the cruise control fuse in the fuse box, as a blown fuse is a common and easily fixable issue. Next, inspect the cruise control buttons on the steering wheel for any signs of damage or sticking, as these can prevent the system from engaging. If these initial checks do not resolve the problem, verify the functionality of the speed sensor, which is essential for maintaining a constant speed. Utilizing an OBD-II scanner can help you identify any error codes related to the cruise control system, providing further insight into the issue. Additionally, ensure that your brake lights are functioning properly, as malfunctioning lights can interfere with cruise control operation. If your vehicle has vacuum lines, inspect them for leaks, as this can also affect cruise control in older models. If you have gone through these steps and the issue persists, it may be time to consult a professional mechanic who specializes in Chevrolet vehicles for a more thorough diagnosis and repair. By following this structured approach, you can efficiently identify and address the problem with your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2018 Chevrolet Suburban?

When troubleshooting cruise control issues in a 2018 Chevrolet Suburban, it's essential to understand the common problems that may lead to its malfunction. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging since this switch is designed to disengage the system when the brakes are applied. Additionally, problems with the speed sensor can hinder the cruise control's ability to maintain a constant speed, as it relies on accurate speed readings to function correctly. Another potential issue is a blown fuse within the cruise control system; checking the fuse box for any blown fuses is a straightforward step that can quickly identify electrical problems. Furthermore, throttle control issues, such as a stuck throttle or malfunctioning throttle position sensor, can also disrupt the cruise control's performance. Lastly, various electrical problems, including wiring issues or a malfunctioning control module, can affect the overall functionality of the cruise control system. By systematically addressing these common problems, drivers can effectively troubleshoot and potentially restore the cruise control feature in their Chevrolet Suburban.

How urgent is it to address the malfunctioning cruise control in a 2018 Chevrolet Suburban?

Addressing a malfunctioning cruise control in a 2018 Chevrolet Suburban is of utmost importance due to the potential safety risks it poses. A malfunction can lead to unexpected acceleration or deceleration, creating hazardous driving conditions that could endanger both the driver and other road users. Furthermore, cruise control issues can detract from the overall driving experience, particularly during long trips where consistent speed is crucial for comfort and convenience. Ignoring these symptoms not only compromises safety but can also lead to increased fuel consumption, as the vehicle struggles to maintain a steady speed. Additionally, delaying repairs may result in further damage to the vehicle's systems, ultimately leading to higher repair costs. Therefore, it is essential to diagnose and address any cruise control malfunctions promptly to ensure a safe, efficient, and enjoyable driving experience.

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2018 Chevrolet Suburban Cruise Control Issues & Solutions