← View Generic B1874 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1874: B1874: 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 B1874 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

This code indicates a malfunction in the door lock system, which may cause doors to lock or unlock unexpectedly, or fail to lock/unlock at all.
⚠️

Symptoms

  • • Doors lock/unlock randomly
  • • doors fail to lock/unlock
  • • door lock switch malfunctions
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Common Causes

  • • Faulty door lock actuator
  • • wiring issue
  • • faulty door lock switch
  • • faulty body control module
🛠️

How to Fix B1874 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/replace as needed. 3. Test door lock switch and replace if faulty. 4. Update body control module software if necessary.

🔧

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

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

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Related Diagnostic Codes

Other codes that may appear with B1874

B1872 Sequential Code

B1872: Airbag System Fault

High
B1873 Sequential Code

B1873: Climate Control Blower Motor Malfunction

Medium
B1875 Sequential Code

B1875: Power Window Relay Circuit Malfunction

Medium
B1876 Sequential Code

B1876: 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