← View Generic B1630 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1630: B1630: Body Control Module (BCM) Security System Malfunction

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 B1630 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

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

  • • Alarm system activation
  • • doors and trunk not locking/unlocking
  • • security light on dashboard
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Common Causes

  • • Faulty BCM sensor
  • • wiring issue
  • • software problem
  • • faulty alarm system module
🛠️

How to Fix B1630 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check BCM sensor connections and wiring for damage or corrosion. 2. Update BCM software if necessary. 3. Replace faulty BCM sensor or alarm system module if necessary.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

BCM sensor Shop ↗ wiring harness Shop ↗ alarm system module Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B1630

B1628 Sequential Code

B1628: Seat Switch Circuit Malfunction

Medium
B1629 Sequential Code

B1629: Body Control Module (BCM) Malfunction - Lighting

Medium
B1631 Sequential Code

B1631: Audio System Fault

Medium
B1632 Sequential Code

B1632: Airbag System Fault

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