← View Generic B0070 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0070: B0070: Body Control Module (BCM) Security System Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$200 - $800
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 B0070 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 BCM, a problem with the security system wiring, or a malfunctioning security system component.
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Symptoms

  • • Car won't start
  • • alarm sounds randomly
  • • security lights flash on and off
  • • or the car's computer displays a security-related error message.
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Common Causes

  • • Faulty BCM
  • • security system wiring issues
  • • malfunctioning security system component
  • • or a problem with the car's key fob.
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How to Fix B0070 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the security system wiring for any damage or corrosion and repair or replace as needed. 2. Update the BCM software if necessary. 3. Replace the faulty BCM or security system component.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Body Control Module (BCM) Shop ↗ security system wiring harness Shop ↗ security system component Shop ↗

Essential Tool

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Related Diagnostic Codes

Other codes that may appear with B0070

B0068 Sequential Code

B0068: Seat Switch Malfunction

Medium
B0069 Sequential Code

B0069: Malfunction of the Rear Fog Light Circuit

Medium
B0071 Sequential Code

B0071: Audio System Malfunction

Medium
B0072 Sequential Code

B0072: Airbag System Fault

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