← View Generic B0870 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0870: B0870: Immobilizer 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 B0870 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The immobilizer system, which prevents the engine from starting unless the correct key is present, has malfunctioned. This code indicates that the system is not functioning correctly, preventing the engine from starting.
⚠️

Symptoms

  • • Engine won't start
  • • key fob not recognized
  • • alarm system not disarming
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Common Causes

  • • Faulty immobilizer module
  • • bad key fob battery
  • • incorrect key code
  • • wiring issue
🛠️

How to Fix B0870 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check key fob battery and replace if necessary. 2. Check key code and reprogram if necessary. 3. Check immobilizer module for faults and replace if necessary. 4. Check wiring for damage or corrosion and repair if necessary.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

immobilizer module Shop ↗ key fob battery Shop ↗ key code Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B0870

B0868 Sequential Code

B0868: Seat Position Sensor Circuit Malfunction

Medium
B0869 Sequential Code

B0869: Exterior Lighting Malfunction

Medium
B0871 Sequential Code

B0871: Audio System Malfunction

Medium
B0872 Sequential Code

B0872: Airbag System Error

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