1999 Chevrolet C2500 Suburban Cruise Control Isn't Working

Fixing Cruise Control Malfunctions in 1999 Chevrolet C2500 Suburban

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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 1999 Chevrolet C2500 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 1999 Chevrolet C2500 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 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 1999 Chevrolet C2500 Suburban?

To effectively diagnose the non-functioning cruise control in your 1999 Chevrolet C2500 Suburban, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the fuses associated with the cruise control system; a blown fuse can often be the simplest explanation for the malfunction. Next, examine the brake switch, as this component is crucial for the cruise control to operate correctly; if the switch is faulty, it may prevent the system from engaging. If your vehicle is equipped with a manual transmission, don’t forget to check the clutch switch, which can also disrupt cruise control functionality. Finally, take a close look at the wiring connected to the cruise control system for any signs of damage or disconnection, as broken wires can lead to significant issues. By following these steps, you can effectively narrow down the potential causes of the problem and move closer to restoring your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 1999 Chevrolet C2500 Suburban?

When troubleshooting the cruise control system in a 1999 Chevrolet C2500 Suburban, it's essential to consider several common problems that could be affecting its functionality. One of the first things to check is the fuse associated with the cruise control; a blown fuse can easily disrupt the system's operation. Additionally, the brake pedal switch plays a crucial role, as it is designed to deactivate the cruise control when the brake is pressed. If this switch is faulty, it may prevent the cruise control from engaging altogether. Another potential issue could be a defective cruise control module, which is responsible for maintaining the set speed; if this component fails, the system may not function as intended. Furthermore, vacuum leaks within the cruise control system can significantly impact its performance, leading to erratic behavior or complete failure. Lastly, a faulty speed sensor can hinder the cruise control's ability to maintain a consistent speed, resulting in operational issues. By systematically diagnosing these common problems, you can effectively identify the root cause of the cruise control malfunction and take the necessary steps to restore its functionality.

How urgent is it to address the non-functioning cruise control in a 1999 Chevrolet C2500 Suburban?

When considering the urgency of fixing a non-functioning cruise control in a 1999 Chevrolet C2500 Suburban, it's essential to recognize that while it may not seem critical at first glance, neglecting this issue can lead to more significant problems down the line. The cruise control system is designed to enhance driving comfort and fuel efficiency, particularly on long journeys, and its failure could indicate underlying electrical or sensor issues that might affect the vehicle's overall performance. By addressing the problem promptly, you not only restore the convenience of cruise control but also mitigate potential safety risks associated with malfunctioning components. Ignoring the issue could result in increased fuel consumption and discomfort during extended drives, making it wise to inspect and repair the system as soon as possible. This proactive approach ensures that your vehicle remains safe and efficient, allowing you to enjoy your driving experience without unnecessary concerns.

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Fixing 1999 Chevrolet C2500 Suburban Cruise Control Issues