2000 GMC K3500 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2000 GMC K3500 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 2000 GMC K3500 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 2000 GMC K3500 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.

A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.

What are the initial steps to diagnose the non-functioning cruise control in a 2000 GMC K3500?

To effectively diagnose the non-functioning cruise control in your 2000 GMC K3500, start with the simplest checks before moving on to more complex issues. Begin by inspecting the cruise control fuse located in the fuse box; a blown fuse is a common culprit that can easily be replaced. Next, examine the brake pedal and throttle body, as any malfunction in these components can disrupt the cruise control system. Pay close attention to the brake and clutch switches, as these are critical for the cruise control's operation; if they are faulty or if there are broken wires from the stem switch, this could prevent the system from engaging. If these initial checks do not resolve the issue, consider replacing the brake switch, which is essential for deactivating the cruise control when the brakes are applied. By following this structured approach, you can systematically identify and address the problem, potentially saving time and money on repairs.

What are the common problems that could cause the cruise control to stop working in a 2000 GMC K3500?

When troubleshooting the cruise control system in a 2000 GMC K3500, it's essential to identify several common problems that may be causing the malfunction. Start by examining the brake and clutch switches, as failures in these components or damaged wiring from the stem switch are frequent culprits that can disrupt cruise control functionality. Additionally, check for a blown fuse or a faulty brake light, as these issues can also prevent the cruise control from engaging properly. It's important to assess the condition of the brake pedal and throttle body, as any problems in these areas can directly affect the performance of the cruise control system. Moreover, if the check engine light is on or if there are any engine-related issues, these could further hinder the cruise control's operation. By methodically investigating these potential failure points, you can effectively diagnose and resolve the issues impacting the cruise control in your GMC K3500.

How urgent is it to repair the non-functioning cruise control in a 2000 GMC K3500?

When evaluating the urgency of repairing the non-functioning cruise control in your 2000 GMC K3500, it's essential to recognize the broader implications of this issue. While the vehicle may still operate without cruise control, the absence of this feature can significantly impact your driving experience. Safety is paramount; a malfunctioning cruise control system can lead to increased driver fatigue, as constant speed adjustments become necessary, heightening the risk of accidents. Additionally, the comfort and convenience that cruise control offers during long drives cannot be overlooked; without it, you may find yourself more fatigued and less focused on the road. Furthermore, if you plan to sell or trade in your vehicle, a fully operational cruise control system can enhance its resale value, making timely repairs a wise investment. Lastly, while the cruise control may not directly affect the vehicle's performance, its failure could signal underlying mechanical issues that, if left unaddressed, might lead to more significant problems down the line. Therefore, addressing the non-functioning cruise control promptly is advisable to ensure safety, enhance comfort, and protect your vehicle's long-term integrity.

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2000 GMC K3500 Cruise Control Issues & Repair Costs