← View Generic B1102 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1102: B1102: 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 B1102 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 sounds
  • • doors lock/unlock randomly
  • • security light flashes
  • • vehicle may not start
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Common Causes

  • • Faulty BCM sensor
  • • wiring issue
  • • software problem
  • • faulty security system module
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How to Fix B1102 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 security system module if necessary.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

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

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B1102

B1100 Sequential Code

B1100: Seat Switch Circuit Malfunction

Medium
B1101 Sequential Code

B1101: Body System Code - Lighting Malfunction

Medium
B1103 Sequential Code

B1103: Audio System Malfunction

Medium
B1104 Sequential Code

B1104: 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