1993 Chevrolet G20 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 1993 Chevrolet G20 and How to Fix Them

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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 1993 Chevrolet G20 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 1993 Chevrolet G20 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.

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 1993 Chevrolet G20?

When troubleshooting the non-functional cruise control in a 1993 Chevrolet G20, it's essential to adopt a systematic diagnostic approach. Start by checking the fuse associated with the cruise control system, as a blown fuse can often be the simplest issue to resolve. Next, inspect the cruise control switch located on the steering wheel; ensure it is operational and not stuck or damaged. Following this, examine the vacuum hoses connected to the cruise control system for any signs of leaks or wear, as these can significantly impact functionality. It's also crucial to verify that the throttle linkage is properly connected and functioning, as any disconnection can prevent the system from engaging. After these checks, test the cruise control module to confirm it is sending the correct signals, and finally, ensure the vehicle speed sensor is working, as it plays a vital role in the cruise control's operation. By methodically 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 1993 Chevrolet G20?

When troubleshooting the cruise control system in a 1993 Chevrolet G20, it's essential to consider several common issues that may be at play. One of the primary suspects is the control module, which can fail and disrupt the entire system's functionality. Additionally, the throttle position sensor plays a crucial role in regulating speed; if it malfunctions, it can prevent the cruise control from engaging properly. Another frequent culprit is a blown fuse, which can easily be checked and replaced if necessary. The brake pedal position sensor is also vital, as it signals when the brakes are applied, and any issues here can deactivate the cruise control. Furthermore, problems within the throttle body can hinder performance, while malfunctions in the PRNDL or shifter position switch can lead to similar disruptions. Lastly, the multi-functional turn signal switch may also contribute to cruise control failures. By systematically examining these components, DIYers can effectively diagnose and potentially resolve the issues affecting their vehicle's cruise control system.

How urgent is it to repair the non-functioning cruise control in a 1993 Chevrolet G20?

Repairing the non-functioning cruise control in a 1993 Chevrolet G20 should be approached with a sense of urgency, primarily due to the safety implications it carries. A malfunctioning cruise control system can lead to erratic speed changes, which may compromise the driver's ability to maintain control, especially on long highway drives. Additionally, the convenience that cruise control offers in reducing driver fatigue during extended trips cannot be overlooked; without it, drivers may find themselves more fatigued, increasing the risk of accidents. Furthermore, the failure of this system could signal deeper issues within the vehicle's electronic systems, potentially leading to more significant problems if left unaddressed. Therefore, while it may not be as critical as other mechanical failures, prioritizing the repair of the cruise control system is essential for ensuring a safe and comfortable driving experience, as well as maintaining the overall performance of the vehicle.

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1993 Chevrolet G20 Cruise Control Not Working | RepairPal