How can I fix the issues with the adaptive cruise control in my Chevrolet Silverado 1500 T1XX?

Fixing Adaptive Cruise Control Issues in Chevrolet Silverado 1500 T1XX (2019-2023)

Tools Required

• OBD-II Scanner
• Torque Wrench
• Multimeter
• Clean Cloth or Degreaser
• Screwdrivers (Phillips and flathead)
• Socket Set
• Safety Glasses
• Torque Specifications Guide (for reassembly)

Repair Instructions

Step 1: Scan for Codes

1. Connect the OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Read and note any error codes related to the cruise control.

Step 2: Inspect the Radar Sensor

1. Open the hood and locate the radar sensor behind the front grille.
2. Clean the sensor surface using a soft cloth and degreaser if necessary.
3. Check for proper alignment; it should be level with the ground and unobstructed.
4. If damaged, replace the radar sensor:
   • Disconnect the wiring harness.
   • Remove the mounting screws.
   • Install the new sensor and reconnect the wiring harness.

Step 3: Check Wiring and Connectors

1. Visually inspect the wiring harness for signs of wear or damage.
2. Use a multimeter to check for continuity in the wiring.
3. Repair or replace any damaged wiring or connectors as necessary.

Step 4: Inspect the Brake System

1. Check the brake lights by pressing the brake pedal; they should illuminate.
2. Use a multimeter to test the brake switch for proper operation. It should show continuity when the pedal is pressed.
3. If faulty, replace the brake switch:
   • Locate the switch above the brake pedal.
   • Disconnect the wiring harness and remove the switch.
   • Install the new switch and reconnect the harness.

Step 5: Update Software

1. Visit a Chevrolet dealership or authorized service center to check for and install any software updates for the vehicle’s ECU.

Step 6: Clear Codes and Test

1. After repairs are completed, use the OBD-II scanner to clear any trouble codes.
2. Test the adaptive cruise control system:
   • Drive the vehicle on a safe, open road.
   • Activate the ACC and monitor for proper operation.

Conclusion

If the adaptive cruise control system continues to exhibit issues after following these steps, consider consulting a professional technician or visiting a Chevrolet dealership for advanced diagnostics and repairs.