2004 Cadillac Seville Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2004 Cadillac Seville and How to Fix Them

Find Repair Location
Reviewed by
Andrew Hajjar
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 2004 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 2004 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 steps to diagnose the non-functioning cruise control in a 2004 Cadillac Seville?

To effectively diagnose the non-functioning cruise control in your 2004 Cadillac Seville, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the fuse associated with the cruise control system, as a blown fuse is a common and easily fixable issue. Next, examine the cruise control switch located on the steering wheel; a malfunctioning switch can prevent the system from engaging. Following this, assess the brake pedal switch, which is crucial since the cruise control disengages when the brake is applied. If these components check out, turn your attention to the speed sensors, ensuring they are functioning correctly and properly connected, as they provide essential data for the cruise control system. Additionally, inspect the vacuum lines for any leaks or damage, particularly if your vehicle's cruise control relies on vacuum operation. Finally, utilize a diagnostic scanner to identify any error codes that may indicate specific problems within the system. By following this structured diagnostic approach, you can efficiently identify and resolve the issues affecting your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2004 Cadillac Seville?

When the cruise control in a 2004 Cadillac Seville ceases to function, it can be frustrating for drivers who rely on this feature for long trips. One of the most common culprits is a failed control module, which is responsible for processing the signals that maintain your set speed. Additionally, issues with sensors or switches, such as a malfunctioning brake switch, can disrupt the system's operation, as these components are crucial for signaling when to disengage cruise control. Throttle actuation problems may also arise, where the throttle body fails to respond correctly to the control module's commands, leading to erratic speed control. For those inclined to tackle the issue themselves, it is essential to systematically check these components, as identifying the root cause can often lead to a straightforward fix, restoring the cruise control functionality without the need for professional intervention.

How urgent is it to address the malfunctioning cruise control in a 2004 Cadillac Seville?

When it comes to a malfunctioning cruise control system in a 2004 Cadillac Seville, the urgency of addressing the issue cannot be overstated. A faulty cruise control can lead to unexpected acceleration or deceleration, creating a significant safety hazard on the road. For DIY enthusiasts, understanding the potential risks is crucial; not only can a malfunction disrupt your driving experience, especially on long trips, but it can also lead to further complications if left unchecked. Ignoring the problem may result in additional wear on the vehicle's components, which could escalate repair costs down the line. By tackling the issue promptly, you not only enhance your vehicle's performance and efficiency but also ensure a safer driving experience. Therefore, if you notice any irregularities with your cruise control, it’s advisable to investigate and address the problem as soon as possible to avoid more serious consequences.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.