Why is my 2019 Chevrolet Silverado 1500 T1XX having issues with the adaptive cruise control?

Chevrolet Silverado 1500 T1XX (2019-2023)

Error Codes

2-3 hours

Time

medium

Difficulty

medium

Severity

Error Code: C0561, C1B00

4 min read

659 words

Problem Statement

Learn about the common issues with the adaptive cruise control in the 2019 Chevrolet Silverado 1500 T1XX, including symptoms, diagnostic steps, and repair instructions.

Error Code

C0561, C1B00

Affected Component

Adaptive Cruise Control System

Estimated Time

2-3 hours

Symptoms

•Inconsistent Speed Control
•System Disable Alerts
•Inability to Set Speed
•Erratic Behavior

Diagnostic Steps

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
•Torque Wrench
•Flathead and Phillips Screwdrivers
•Multimeter
•Cleaning Supplies
•Diagnostic Software (optional)
•Safety Glasses and Gloves

Related Faults

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Solution

Problem Overview

The adaptive cruise control (ACC) in your 2019 Chevrolet Silverado 1500 (T1XX) is designed to automatically adjust your vehicle's speed to maintain a safe following distance from the vehicle ahead. If you are experiencing issues with this system, it may be due to various factors including sensor malfunctions, software issues, or problems with the vehicle's electrical system.

Tools Required

OBD-II Scanner
Torque Wrench
Flathead and Phillips Screwdrivers
Multimeter
Cleaning Supplies (e.g., microfiber cloth, window cleaner)
Diagnostic Software (optional, for advanced diagnostics)
Safety Glasses and Gloves

Repair Instructions

Step 1: Initial Inspection

Safety First: Ensure the vehicle is parked on a flat surface with the engine off. Engage the parking brake.
Check for Warning Lights: Start the vehicle and observe the dashboard for indicators related to the ACC.

Step 2: Clean the Windshield

Clean the Area: Use a microfiber cloth and glass cleaner to clean the area around the camera sensor mounted behind the rearview mirror. Ensure no obstructions are present.

Step 3: Scan for DTCs

Connect OBD-II Scanner: Plug in your OBD-II scanner to the diagnostic port (usually located under the dashboard).
Run Scan: Retrieve any diagnostic trouble codes, especially those related to the ACC system, such as C0561 (Cruise Control System Fault) or C1B00 (Radar Module Fault).
Document Codes: Note any codes and their descriptions for further research.

Step 4: Inspect Radar Sensor

Locate the Radar Sensor: The radar sensor is typically located near the front grille.
Inspect for Damage: Look for signs of physical damage or misalignment.
Check Connections: Ensure the wiring harness is securely connected and free of corrosion.

Step 5: Perform Electrical Checks

Check Voltage: Use a multimeter to check the voltage at the radar sensor connector to ensure it is receiving power.
Inspect for Shorts: Look for any shorts in the wiring that could affect the sensor operation.

Step 6: Module Checks

Inspect Module Connections: Access the Adaptive Cruise Control Module (usually located beneath the dashboard) and ensure all connections are tight and free of corrosion.
Reprogram/Update Software: If the vehicle has a software update available, perform this step using the appropriate diagnostic equipment.

Step 7: Test Drive

Reassemble Any Components: If you removed any panels or components, reassemble them securely.
Test the System: Take the vehicle for a test drive, engaging the adaptive cruise control at various speeds and conditions. Monitor for any issues or warning lights.

Conclusion

If the problem persists after completing these diagnostics and repairs, it may be necessary to consult a qualified technician or a Chevrolet dealership for further investigation. Advanced issues may require specialized equipment or software that is not available to the general public. Always prioritize safety and adhere to manufacturer specifications when performing repairs.