← View Generic B0634 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0634: B0634: 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 B0634 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B0634 code indicates a malfunction in the door locks actuator circuit, which controls the operation of the door locks. This can cause issues with locking and unlocking the doors, and may also trigger the airbag light to come on.
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Symptoms

  • • Doors may not lock or unlock properly
  • • airbag light may be illuminated
  • • door locks may be stuck or jammed
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Common Causes

  • • Faulty door locks actuator
  • • wiring issue
  • • faulty body control module
  • • corrosion or water damage in the door locks circuit
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How to Fix B0634 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the door locks actuator for signs of wear or damage and replace it if necessary. 2. Inspect the wiring and connectors for damage or corrosion and repair or replace as needed. 3. Check the body control module for any fault codes and clear any stored codes. 4. If the issue persists, consider replacing the body control module.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

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

Essential Tool

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Related Diagnostic Codes

Other codes that may appear with B0634

B0632 Sequential Code

B0632: Airbag System Module Fault

High
B0633 Sequential Code

B0633: Climate Control Fan Motor Fault

Medium
B0635 Sequential Code

B0635: Power Window Regulator Fault

Medium
B0636 Sequential Code

B0636: Seat Switch Circuit 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