← View Generic B3850 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B3850: B3850: Door Locks Actuator Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$50 - $200
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 B3850 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B3850 code indicates a malfunction in the door lock actuator, which may cause the doors to malfunction or not lock/unlock properly.
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Symptoms

  • • Doors won't lock/unlock
  • • door locks stuck
  • • or unusual noises from the door locks
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Common Causes

  • • Faulty door lock actuator
  • • wiring issues
  • • or a problem with the door lock module
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How to Fix B3850 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the door lock actuator for signs of wear or damage. Replace if necessary. 2. Inspect the wiring and connectors for damage or corrosion. Repair or replace as needed. 3. Check the door lock module for any errors or faults. Clear any error codes and test the door locks.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

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

Essential Tool

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Related Diagnostic Codes

Other codes that may appear with B3850

B3848 Sequential Code

B3848: Airbag System Fault

High
B3849 Sequential Code

B3849: Climate Control Temperature Sensor Malfunction

Medium
B3851 Sequential Code

B3851: Power Window Regulator Malfunction

Medium
B3852 Sequential Code

B3852: Seat Position Sensor 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