Chevrolet Silverado 3500 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Chevrolet Silverado 3500 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
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25% chance it's the
Throttle
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20% chance it's
Something else
The most common reasons a Chevrolet Silverado 3500 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 Chevrolet Silverado 3500 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 throttle position sensor fails, the engine's computer tends to overcompensate with fuel, leading black exhaust coming from the tailpipe. There is a strong possibility of engine misfires, and the check engine light will come on.

Throttle position sensors can also develop "dead spots," or certain places along the throttle curve where it doesn't get a reading. When this happens, the above symptoms can occur but then stop when you further press or let off the gas pedal.

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.

Troubleshooting Cruise Control Issues in a Chevrolet Silverado 3500

When troubleshooting cruise control issues in your Chevrolet Silverado 3500, it's essential to adopt a methodical diagnostic approach. Begin by checking the cruise control switch to ensure it is functioning correctly, as this is often a straightforward fix. Next, inspect the brake lights; if they are sticking, this can inadvertently disable the cruise control system. Following this, examine the throttle operation to confirm it is responding appropriately. If these initial checks do not resolve the issue, delve deeper by assessing the control module and any associated sensors for faults. This step-by-step method not only simplifies the troubleshooting process but also helps you identify and rectify the problem efficiently, ensuring your cruise control system is back in working order.

What Are the Common Problems Causing Cruise Control Issues in a Chevrolet Silverado 3500?

When dealing with cruise control issues in a Chevrolet Silverado 3500, it's crucial to understand the common problems that may arise. One of the primary culprits is a failed control module, sensor, or switch, which can disrupt the entire cruise control system's functionality. Additionally, throttle actuation problems can significantly impact how the cruise control operates, as any malfunction in this area can prevent the system from maintaining speed effectively. Another frequent issue is the failure of the throttle position sensor; when this component malfunctions, it can lead to erratic engine behavior, such as excessive fuel consumption and black exhaust emissions. By identifying these common problems, DIYers can take the necessary steps to diagnose and potentially resolve cruise control issues, ensuring a smoother driving experience in their Silverado 3500.

Why is the Cruise Control Not Working in a Chevrolet Silverado 3500?

When the cruise control in your Chevrolet Silverado 3500 is not functioning, it’s crucial to address the issue promptly, as neglecting it can lead to safety risks and potentially more significant vehicle problems. A malfunctioning cruise control system can stem from various causes, such as a blown fuse, a defective brake pedal switch, or issues with the throttle control system. If the cruise control fails to engage, it may be due to the vehicle's speed being below 25 mph or being in an inappropriate gear, which can hinder its operation. Additionally, older models may experience problems from broken vacuum lines or faulty switches. Ignoring these symptoms not only compromises your driving experience but can also lead to more extensive repairs down the line. Therefore, it’s advisable to conduct a thorough inspection and address any identified issues to ensure your vehicle remains safe and reliable on the road.

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