Pontiac G5 Cruise Control Isn't Working

Troubleshooting Common Issues with Pontiac G5 Cruise Control and How to Restore Functionality

Find Repair Location
Reviewed by
Aisha
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 Pontiac G5 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 Pontiac G5 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 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.

Troubleshooting Cruise Control Issues in a Pontiac G5

When troubleshooting cruise control issues in your Pontiac G5, begin with the most straightforward checks to avoid unnecessary complications. Start by inspecting the fuse related to the cruise control system, as a blown fuse is a common and easily fixable problem. Next, examine the brake lights; if they are not functioning correctly, it could indicate a faulty brake switch, which is essential for cruise control operation. If these initial checks do not resolve the issue, look for vacuum leaks or damaged vacuum lines, as these can significantly impact the cruise control system's performance. Additionally, inspect the cruise control servo for any visible damage. If the problem persists, methodically test each component, including the cruise control main on/off switch, set/resume switch, and actuator, to identify any malfunctioning parts. Applying electrical grade dielectric grease to the connectors can also help improve connectivity and prevent future issues. Remember, addressing these problems promptly is crucial for safe driving, especially since sudden cruise control failure can pose serious risks on the road.

What Could Cause the Cruise Control to Malfunction in a Pontiac G5?

When dealing with cruise control malfunctions in a Pontiac G5, several common problems may be at the root of the issue. One frequent culprit is a failed control module, which can disrupt the entire system's functionality. Additionally, issues with the brake switch, particularly if error code P0573 appears, often indicate an electrical malfunction that could stem from a defective cruise control switch. It's also essential to check for blown fuses, as these can easily interrupt the power supply to the cruise control system. The condition of the brake pedal and throttle body should not be overlooked, as any irregularities here can directly affect cruise control performance. Furthermore, problems with the throttle control system or the ABS may also contribute to malfunctions. In older models, a broken vacuum line can be a hidden issue that disrupts the cruise control's operation. By systematically checking these components, DIYers can effectively troubleshoot and identify the specific cause of the cruise control failure, paving the way for successful repairs.

Why is the Cruise Control Not Working in a Pontiac G5?

When the cruise control in your Pontiac G5 fails to operate, it’s crucial to address the issue promptly to avoid potential safety hazards and further vehicle damage. Common causes such as a malfunctioning control module, faulty sensors, or defective switches can lead to a loss of control while driving, which may increase the risk of accidents. Additionally, problems with the throttle actuation or brake pedal switch can create situations where the cruise control may inadvertently disengage, leaving you without the assistance you rely on during long drives. Ignoring these symptoms not only compromises your driving experience but can also lead to more extensive repairs down the line. Therefore, it’s advisable to diagnose the specific cause of the malfunction as soon as possible, ensuring that your vehicle remains safe and reliable on the road.

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.