Troubleshooting and Fixing Lane Assist Issues in Chevrolet Silverado 1500 T1XX (2019-2023)

Step 1: Check for System Alerts

• Symptoms: Any warning lights or messages on the dashboard?
• Action: Use an OBD-II scanner to check for diagnostic trouble codes (DTCs) related to the Lane Assist system.

Step 2: Inspect the Camera and Sensors

• Symptoms: Physical obstruction or damage to the front camera or sensors.
• Action: Visually inspect the forward-facing camera (usually located near the rearview mirror) and the front bumper sensors for dirt, debris, or damage.

Step 3: Verify System Settings

• Symptoms: Lane Assist might be disabled.
• Action: Navigate to the settings menu on the infotainment system to ensure Lane Assist is enabled.

Step 4: Calibrate the Lane Assist System

• Symptoms: Misalignment of the system may cause it not to work correctly.
• Action: If no physical damage is found, the system may require calibration.

Tools Required

• OBD-II Scanner
• Clean microfiber cloth
• Torque wrench
• Screwdriver set (Torx and Phillips)
• Leveling tools for calibration (if needed)

Repair Instructions

Step 1: Retrieve Diagnostic Codes

1. Connect the OBD-II scanner to the vehicle's diagnostic port (usually located under the dashboard, near the steering column).
2. Turn the ignition to the "ON" position without starting the engine.
3. Follow the scanner's instructions to retrieve any stored codes.
4. Note any relevant codes, especially those related to the Lane Assist system.

Step 2: Clean Camera and Sensors

1. Use a clean microfiber cloth to gently wipe the front camera and sensors.
2. Ensure there are no obstructions (such as stickers or dirt) that could hinder visibility.
3. Test the system again after cleaning.

Step 3: Check Lane Assist Settings

1. Start the vehicle and access the infotainment system.
2. Navigate to Settings > Driver Assistance > Lane Keep Assist.
3. Ensure that the Lane Keep Assist feature is turned ON.
4. Exit the settings and test the system while driving.

Step 4: Calibration of Lane Assist System

1. If the system still does not work after the above checks, calibration may be necessary.
2. Calibration Procedure (Refer to the vehicle service manual for specifics):
   • Drive the vehicle to a flat, open area away from other vehicles.
   • Follow the calibration procedure as outlined in the service manual or use a dedicated calibration tool if available.
   • Ensure the vehicle is level and track straight for the calibration process.
   • Make sure to set the steering wheel at the straight-ahead position during calibration.
3. After calibration, test the Lane Assist system again while driving.

Step 5: Clear Codes (if applicable)

1. If any DTCs were present and issues were resolved, use the OBD-II scanner to clear the codes.
2. Test-drive the vehicle to ensure the Lane Assist functionality is restored and no new codes appear.

Step 6: Seek Professional Help (if necessary)

• If the Lane Assist system is still malfunctioning after the above steps, there may be an underlying hardware issue (such as a faulty camera or sensor). In this case, it is advisable to consult a certified Chevrolet technician for further diagnosis and repair.

Conclusion

By following these detailed steps, you can effectively troubleshoot and potentially fix the Lane Assist issue in your Chevrolet Silverado 1500 T1XX. Always ensure to consult the service manual and adhere to safety precautions when working on your vehicle.