← View Generic B0278 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0278: B0278: 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 B0278 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The immobilizer system has detected a malfunction, preventing the vehicle from starting or running. This code is typically set when the immobilizer system is not functioning correctly, preventing the vehicle from starting.
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Symptoms

  • • Vehicle will not start
  • • engine will crank but not turn over
  • • or will start and then stall
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Common Causes

  • • Faulty immobilizer system module
  • • faulty key fob battery
  • • or incorrect key fob programming
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How to Fix B0278 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the key fob battery and replace if necessary. 2. Check the immobilizer system module for any signs of physical damage or corrosion. 3. If the issue persists, reprogram the key fob using a specialized tool.

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Need Maintenance Info for Your SILVERADO 1500 PICKUP?

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View 2020 Chevrolet SILVERADO 1500 PICKUP Specs

Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

immobilizer system module Shop ↗ key fob battery Shop ↗

Essential Tool

Must Have

OBD2 Scanner

Read & clear codes on your 2020 Chevrolet SILVERADO 1500 PICKUP

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🔗

Related Diagnostic Codes

Other codes that may appear with B0278

B0276 Sequential Code

B0276: Seat Switch Circuit Malfunction

Medium
B0277 Sequential Code

B0277: Headlamp Low Beam Out of Adjustment

Medium
B0279 Sequential Code

B0279: Audio System Malfunction

Medium
B0280 Sequential Code

B0280: 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