← View Generic B1302 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1302: B1302: 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 B1302 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
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Common Causes

  • • Faulty BCM sensor
  • • wiring issue
  • • software glitch
  • • faulty security module
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How to Fix B1302 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 module if necessary.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

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

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B1302

B1300 Sequential Code

B1300: Seat Position Sensor Circuit Malfunction

Medium
B1301 Sequential Code

B1301: Body Control Module (BCM) Lighting Circuit Malfunction

Medium
B1303 Sequential Code

B1303: Audio System Malfunction

Medium
B1304 Sequential Code

B1304: Airbag System 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