1998 Chevrolet C1500 Suburban Cruise Control Isn't Working

Fixing Cruise Control Malfunctions in 1998 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 1998 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 1998 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 diagnostic steps to troubleshoot the non-functional cruise control in a 1998 Chevrolet C1500 Suburban?

To effectively troubleshoot the non-functional cruise control in your 1998 Chevrolet C1500 Suburban, begin with the simplest diagnostic steps. Start by checking the fuse associated with the cruise control system; a blown fuse can often be the culprit behind the malfunction. Next, inspect the wiring for any visible damage or loose connections, as these can disrupt the electrical flow necessary for the system to operate. After ensuring the wiring is intact, test the cruise control switch for proper functionality using a multimeter to check for continuity. If your vehicle's cruise control relies on vacuum, examine the vacuum lines for any leaks or blockages that could hinder performance. Additionally, using a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues. Finally, assess the cruise control module for signs of damage or malfunction, as this component is crucial for the system's operation. By systematically following these steps, you can effectively diagnose and address the issues affecting your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 1998 Chevrolet C1500 Suburban?

When dealing with cruise control issues in a 1998 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 associated with the cruise control system; a blown fuse can easily disrupt its functionality. Additionally, the brake pedal switch is another critical component; if it is faulty, it may prevent the cruise control from engaging, as the system relies on this switch to know when to activate. Another potential culprit is the speed sensor, which must accurately detect the vehicle's speed for the cruise control to function correctly. If the speed sensor is defective, it can lead to erratic behavior or complete failure of the cruise control system. Furthermore, vacuum leaks can significantly impact the cruise control's performance, as the system often relies on vacuum pressure to operate effectively. A defective cruise control module can also be the source of the problem, as it controls the overall operation of the system. Lastly, wiring issues, such as frayed or disconnected wires, can disrupt communication between the various components of the cruise control system. By systematically checking these areas, DIYers can effectively diagnose and potentially resolve the cruise control malfunction in their Suburban.

How urgent is it to address the non-functioning cruise control in a 1998 Chevrolet C1500 Suburban?

Addressing the non-functioning cruise control in a 1998 Chevrolet C1500 Suburban is crucial for both safety and driving comfort. While it may not seem like an immediate emergency, neglecting this issue can lead to significant safety risks, especially during long drives or highway travel where maintaining a consistent speed is essential. A malfunctioning cruise control system can disrupt traffic flow and increase the likelihood of accidents, as drivers may struggle to maintain their speed manually. Additionally, the underlying cause of the malfunction could range from a simple blown fuse to more complex electrical issues, which, if left unchecked, may result in further damage to the vehicle. Therefore, it is advisable to have the system inspected by a qualified mechanic as soon as possible. This proactive approach not only ensures the safe operation of your vehicle but also enhances your driving experience by restoring the convenience and efficiency that cruise control offers.

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