← View Generic B0066 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0066: B0066: Door Locks Actuator Circuit Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$100 - $300
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2020 Chevrolet
SILVERADO 1500 PICKUP
⚠️

Important for 2020 Chevrolet SILVERADO 1500 PICKUP Owners

Before starting repairs, verify which engine your 2020 Chevrolet SILVERADO 1500 PICKUP has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does B0066 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B0066 code indicates a malfunction in the door locks actuator circuit, which may cause issues with door locking and unlocking functions.
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Symptoms

  • • Door locks may not function properly
  • • or may lock/unlock randomly
  • • or may not respond to key fob commands.
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Common Causes

  • • Faulty door locks actuator
  • • wiring issues
  • • faulty body control module
  • • or a malfunctioning door lock switch.
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How to Fix B0066 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check and repair or replace faulty wiring. 2. Test and replace the door locks actuator if necessary. 3. Update the body control module software if necessary. 4. Check and repair or replace the door lock switch if necessary.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Door locks actuator Shop ↗ Wiring harness Shop ↗ Body control module Shop ↗ Door lock switch Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B0066

B0064 Sequential Code

B0064: Airbag System Malfunction

Medium
B0065 Sequential Code

B0065: Climate Control Actuator Malfunction

Medium
B0067 Sequential Code

B0067: Window Regulator Malfunction

Medium
B0068 Sequential Code

B0068: Seat Switch Malfunction

Medium

💡 Why These Codes Are Related:

  • • Similar Issues: Same root cause or component failure
  • • Related Problems: Often occur together due to system interactions
  • • Sequential Codes: Progressive failure stages or multiple sensors
  • • Same System: Components within the same automotive system