1999 Chevrolet C1500 Suburban Cruise Control Isn't Working

Cruise Control Malfunctions in 1999 Chevrolet C1500 Suburban

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Reviewed by
Bo Fader
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 C1500 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 C1500 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 C1500 Suburban?

When diagnosing the non-functioning cruise control in a 1999 Chevrolet C1500 Suburban, it's essential to adopt a methodical approach that begins with the most straightforward solutions. Start by inspecting the cruise control fuse located in the fuse box, as a blown fuse is a common and easily fixable issue. Next, check the cruise control buttons on the steering wheel to ensure they are operational, as malfunctioning buttons can prevent the system from engaging. Following this, verify the speed sensor's functionality, since it is integral to the cruise control system's operation; a faulty sensor can lead to significant issues. Additionally, examine the vacuum lines for any signs of leaks or damage, as these can disrupt the cruise control's performance. If these initial checks do not resolve the problem, consider using a diagnostic scanner to identify any error codes that may indicate specific faults within the system. Finally, if all else fails, testing the cruise control module may be necessary, and consulting the vehicle's manual will provide guidance on how to proceed. By systematically addressing these areas, you can effectively diagnose and potentially resolve the cruise control issue in your Suburban.

What are the common problems that could cause the cruise control to stop working in a 1999 Chevrolet C1500 Suburban?

When dealing with a non-functional cruise control system in a 1999 Chevrolet C1500 Suburban, it's crucial to understand the common problems that may be at play. One of the first things to check is the fuse; a blown fuse can easily disrupt the entire system. Next, consider the brake pedal switch, which is designed to disengage cruise control when the brake is applied; if this switch is faulty, it may prevent the system from engaging. Additionally, the cruise control module itself could be defective, leading to operational issues. Vacuum leaks are another potential culprit, as they can interfere with the system's ability to maintain speed. A malfunctioning speed sensor can also hinder performance, as it is responsible for relaying speed information to the cruise control system. Lastly, inspect the wiring for any damage or disconnections, as these can also cause the cruise control to fail. By systematically checking these components, DIYers can effectively diagnose and address the issue, restoring functionality to their vehicle's cruise control system.

How urgent is it to address the non-functioning cruise control in a 1999 Chevrolet C1500 Suburban?

When considering the urgency of fixing the non-functioning cruise control in a 1999 Chevrolet C1500 Suburban, it is crucial to recognize the safety implications involved. A malfunctioning cruise control system can lead to erratic speed changes, which may pose significant risks while driving, especially on highways where maintaining a steady speed is essential. Additionally, the comfort and convenience that cruise control provides cannot be overlooked; it allows drivers to relax their foot during long trips, reducing fatigue and enhancing the overall driving experience. Promptly diagnosing and addressing the issue is advisable, as neglecting it could lead to more severe problems that require costly repairs. Furthermore, maintaining all vehicle components, including the cruise control system, is vital for preserving the vehicle's resale value. By taking action sooner rather than later, you not only ensure a safer and more enjoyable driving experience but also protect your investment in the vehicle.

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