← View Generic B0390 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0390: B0390: Body Control Module (BCM) Security Fault

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$100 - $500
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 B0390 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The Body Control Module (BCM) has detected a security fault, which may be caused by a faulty sensor, wiring issue, or software problem.
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Symptoms

  • • Alarm system malfunction
  • • door locks not functioning
  • • or immobilizer system failure
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Common Causes

  • • Faulty sensor
  • • wiring issue
  • • software problem
  • • or BCM failure
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How to Fix B0390 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check and clear any trouble codes. 2. Inspect and repair or replace faulty sensors. 3. Check and repair or replace wiring. 4. Update software if necessary. 5. Replace BCM if faulty.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Body Control Module Shop ↗ Sensor Shop ↗ Wiring Shop ↗

Essential Tool

Must Have

OBD2 Scanner

Read & clear codes on your 2020 Chevrolet SILVERADO 1500 PICKUP

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🔗

Related Diagnostic Codes

Other codes that may appear with B0390

B0388 Sequential Code

B0388: Seat Position Sensor Circuit Malfunction

Medium
B0389 Sequential Code

B0389: Exterior Lighting Malfunction

Medium
B0391 Sequential Code

B0391: Audio System Malfunction

Medium
B0392 Sequential Code

B0392: Airbag System Sensor Circuit Malfunction

High

💡 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