← View Generic B1186 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1186: B1186: 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 B1186 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B1186 code indicates a malfunction in the door lock system, which may cause the doors to lock or unlock unexpectedly, or not function at all.
⚠️

Symptoms

  • • Doors locking or unlocking unexpectedly
  • • inability to lock or unlock doors
  • • door ajar warning light on dashboard
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Common Causes

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

How to Fix B1186 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Disconnect the battery to reset the system. 2. Check and repair or replace faulty wiring. 3. Test the door lock actuator and replace if faulty. 4. Check and replace the door lock module if faulty. 5. Test the door lock switch 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 B1186

B1184 Sequential Code

B1184: Airbag System Fault

High
B1185 Sequential Code

B1185: Climate Control Fan Motor Malfunction

Medium
B1187 Sequential Code

B1187: Window Regulator Malfunction

Medium
B1188 Sequential Code

B1188: 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