2016 Cadillac CT6 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2016 Cadillac CT6 and How to Fix Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2016 Cadillac CT6 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 2016 Cadillac CT6 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 are the steps to diagnose the cruise control issue in a 2016 Cadillac CT6?

When diagnosing a cruise control issue in a 2016 Cadillac CT6, it's crucial to follow a methodical diagnostic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse, as a blown fuse is a common culprit for malfunctioning systems. Next, examine the cruise control buttons on the steering wheel for any signs of sticking or failure, as these can significantly affect operation. Utilizing a diagnostic scanner to retrieve error codes from the vehicle's onboard computer can provide insights into potential electronic issues. Additionally, checking the speed sensors is vital, as they are integral to the cruise control's functionality. It's also essential to inspect the wiring and connections for any signs of damage or corrosion that could interfere with signal transmission. Testing the cruise control module will help confirm that it is operating correctly. Finally, referring to the Cadillac CT6 service manual can provide specific troubleshooting steps tailored to your vehicle. By systematically addressing these areas, you can effectively diagnose and resolve cruise control issues, enhancing your driving experience.

What are the common problems that could cause the cruise control to stop working in a 2016 Cadillac CT6?

When troubleshooting the cruise control system in a 2016 Cadillac CT6, it's essential to consider several common problems that may be at play. A faulty speed sensor is often a primary culprit, as it can hinder the system's ability to accurately gauge the vehicle's speed, preventing engagement or consistent speed maintenance. Additionally, issues with the brake light switch can disrupt the cruise control's functionality; if this switch is malfunctioning, it may erroneously signal that the brake is engaged, thus preventing activation. Another area to inspect is the throttle actuator, which is responsible for controlling the engine's throttle opening; any malfunction here can impede the system's ability to maintain speed. Electrical problems, such as blown fuses or wiring issues, can also lead to cruise control failure, so checking the vehicle's electrical system is crucial. Lastly, vacuum leaks in the engine can affect the cruise control's operation, as the system relies on vacuum pressure to function correctly. By systematically examining these components, DIYers can identify and potentially resolve the issues affecting their cruise control system.

How urgent is it to address the malfunctioning cruise control in a 2016 Cadillac CT6?

Addressing a malfunctioning cruise control in a 2016 Cadillac CT6 is of utmost urgency due to the significant safety risks it poses. A malfunction can lead to unexpected acceleration or deceleration, which can endanger both the driver and other road users. Additionally, neglecting this issue can compromise the overall driving experience, making it inconvenient and stressful to operate the vehicle. Beyond immediate safety concerns, ignoring cruise control problems may result in further damage to the vehicle's systems, leading to more extensive and costly repairs down the line. Therefore, it is crucial to diagnose and repair any cruise control malfunctions promptly, ensuring that the vehicle operates safely and efficiently while also protecting your investment in the long run.

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2016 Cadillac CT6 Cruise Control Issues & Repair Costs