2000 Cadillac Seville Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2000 Cadillac Seville

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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 2000 Cadillac Seville 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 Cadillac Seville 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.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

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 Cadillac Seville?

When diagnosing the non-functioning cruise control in a 2000 Cadillac Seville, it's essential to adopt a methodical diagnostic approach. Begin by checking the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, inspect the cruise control switch for any visible damage or wear, since a malfunctioning switch can prevent the system from engaging. Following this, examine the brake pedal switch, which is crucial for disengaging the cruise control when brakes are applied; ensure it is operational and not stuck. Utilizing a diagnostic scanner to check for error codes can provide further insights into any underlying issues affecting the cruise control system. Finally, test the vehicle speed sensor, as it is vital for maintaining a constant speed; ensure it is accurately sending signals to the cruise control module. By following these steps, you can effectively diagnose and address the issues with your cruise control system.

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

When troubleshooting cruise control issues in a 2000 Cadillac Seville, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty cruise control switch, which can hinder the system's ability to engage or disengage properly. Additionally, a blown fuse in the vehicle's fuse box can disrupt the entire cruise control functionality, making it crucial to check for any electrical issues. Another potential problem is vacuum leaks within the system; these leaks can prevent the cruise control from maintaining the desired speed. Furthermore, a defective speed sensor can lead to inaccurate speed readings, which directly impacts the cruise control's performance. Lastly, issues with the brake light switch can also be problematic, as this switch is designed to deactivate the cruise control when the brake pedal is pressed. By identifying these common issues, DIY enthusiasts can better diagnose and address the malfunction, ensuring a smoother driving experience.

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

Repairing the non-functioning cruise control in your 2000 Cadillac Seville should be treated as an urgent matter due to the potential safety risks involved. A malfunctioning cruise control system can lead to erratic speed changes, which not only compromises your safety but also that of other road users. Additionally, the comfort and convenience that cruise control provides during long drives cannot be overlooked; it allows for a more relaxed driving experience by maintaining a consistent speed. Furthermore, neglecting this issue could adversely affect your vehicle's resale value, as prospective buyers often look for fully functional features. Lastly, addressing the cruise control problem may uncover other underlying electrical or mechanical issues that could escalate if left unattended. Therefore, taking prompt action to diagnose and repair the cruise control system is essential for ensuring a safe, comfortable, and valuable driving experience.

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