← View Generic B3938 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B3938: B3938: Door Locks 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 B3938 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B3938 code indicates a malfunction in the door lock system, which may cause the doors to malfunction or not lock/unlock properly.
⚠️

Symptoms

  • • Doors not locking/unlocking
  • • door locks stuck
  • • door ajar warning light on
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Common Causes

  • • Faulty door lock actuator
  • • wiring issue
  • • door lock module failure
  • • faulty door lock switch
🛠️

How to Fix B3938 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check door lock actuator for proper operation and replace if faulty. 2. Inspect wiring for damage or corrosion and repair/reconnect as needed. 3. Replace door lock module if faulty. 4. Check door lock switch for proper operation and replace if faulty.

🔧

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Door lock actuator Shop ↗ Wiring harness Shop ↗ Door lock module Shop ↗ Door lock switch Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B3938

B3936 Sequential Code

B3936: Airbag System Fault

High
B3937 Sequential Code

B3937: Climate Control Temperature Sensor Malfunction

Medium
B3939 Sequential Code

B3939: Power Window Regulator Malfunction

Medium
B3940 Sequential Code

B3940: Seat Position Sensor 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