← View Generic B1634 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1634: B1634: Door Locks Actuator 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 B1634 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B1634 code indicates a malfunction in the door lock actuator, which may cause issues with door locking and unlocking functions.
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Symptoms

  • • Door locks may not function properly
  • • or may not lock/unlock at all
  • • and may also trigger a warning light on the dashboard.
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Common Causes

  • • Faulty door lock actuator
  • • wiring issues
  • • or a problem with the door lock switch.
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How to Fix B1634 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Disconnect the battery to reset the system. 2. Check and repair any wiring issues. 3. Replace the door lock actuator if faulty. 4. Test the door lock switch and replace if necessary.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Door lock actuator Shop ↗ Wiring harness Shop ↗

Essential Tool

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Related Diagnostic Codes

Other codes that may appear with B1634

B1632 Sequential Code

B1632: Airbag System Fault

High
B1633 Sequential Code

B1633: Climate Control Fan Motor Fault

Medium
B1635 Sequential Code

B1635: Power Window Relay Circuit Malfunction

Medium
B1636 Sequential Code

B1636: 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