How can I fix the cruise control malfunction in my 2019 Chevrolet Silverado 1500 T1XX?

Chevrolet Silverado 1500 T1XX (2019-2023)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

650 words

Problem Statement

Learn how to diagnose and repair cruise control malfunctions in your 2019 Chevrolet Silverado 1500 T1XX with step-by-step instructions.

Affected Component

Cruise Control System

Estimated Time

2-4 hours

Symptoms

•Cruise Control Not Engaging
•Cruise Control Disconnects Unexpectedly
•Cruise Control Indicator Light remains off or blinks erratically
•Fault Codes may be displayed

Diagnostic Steps

1
Visual Inspection of cruise control switch and wiring
2
Check for Fault Codes using OBD-II Scanner
3
Test the Cruise Control Switch with a Multimeter
4
Check Brake Pedal Switch functionality
5
Inspect Vehicle Speed Sensor (VSS)

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II Scanner
•Multimeter

Related Faults

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Back to Generation

Fixing Cruise Control Malfunction in a 2019 Chevrolet Silverado 1500 T1XX

Step 1: Visual Inspection

Tools Required: None
Inspect the cruise control switch for physical damage.
Check the wiring harness and connectors around the cruise control switch and PCM (Powertrain Control Module) for loose connections or frayed wires.

Step 2: Check for Fault Codes

Tools Required: OBD-II Scanner
Connect the OBD-II scanner to the vehicle’s diagnostic port.
Retrieve any stored fault codes related to the cruise control system. Common codes include:
- P0571: Cruise Control Switch A Circuit Range/Performance Problem
- P0572: Cruise Control Switch A Circuit Low
- P0573: Cruise Control Switch A Circuit High
Note down any codes and clear them to see if they reappear after a test drive.

Step 3: Test the Cruise Control Switch

Tools Required: Multimeter
Disconnect the cruise control switch connector.
Set the multimeter to measure continuity.
Test the switch by pressing each button. Ensure that the multimeter shows continuity when the button is pressed and no continuity when it is released.

Step 4: Check Brake Pedal Switch

Tools Required: Multimeter
Locate the brake pedal switch, which is usually mounted near the brake pedal.
Ensure the switch is functioning properly. You can test the switch by pressing the brake pedal and measuring continuity at the connector.
If the brake pedal switch is faulty, it could prevent the cruise control from engaging.

Step 5: Inspect Vehicle Speed Sensor (VSS)

Tools Required: Multimeter or OBD-II Scanner
Check for proper operation of the Vehicle Speed Sensor. Use the OBD-II scanner to monitor vehicle speed while driving.
If the vehicle speed does not register correctly, it may prevent cruise control from functioning.

Repair Instructions

Step 1: Replace Faulty Components

If the cruise control switch is faulty:
1. Disconnect the negative battery terminal to prevent electrical shorts.
2. Remove the steering wheel cover (if applicable) to access the cruise control switch.
3. Disconnect the cruise control switch connector.
4. Remove the faulty switch.
5. Install the new switch and reconnect the connector.
6. Reassemble the steering wheel cover and reconnect the battery.
If the brake pedal switch is faulty:
1. Disconnect the negative battery terminal.
2. Locate the brake pedal switch and disconnect it from the wiring harness.
3. Remove the faulty switch from its mounting bracket.
4. Install the new brake pedal switch and reconnect the wiring harness.
5. Reconnect the battery.
If the Vehicle Speed Sensor (VSS) is faulty:
1. Locate the VSS (usually found on the transmission).
2. Disconnect the wiring harness from the sensor.
3. Remove the sensor from its mounting location.
4. Install the new VSS and reconnect the wiring harness.

Step 2: Recheck System Functionality

After replacing any faulty components, reconnect the battery and start the vehicle.
Test the cruise control system to ensure it engages and maintains speed.

Step 3: Clear Fault Codes

If you previously retrieved any fault codes, use the OBD-II scanner to clear any codes and perform a test drive.

Conclusion

By following these structured diagnostic and repair steps, you should be able to identify and fix the cruise control malfunction in your 2019 Chevrolet Silverado 1500 T1XX. If issues persist after these repairs, further diagnostic work may be needed, possibly involving the PCM or other related systems.