← View Generic B1278 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1278: B1278: Immobilizer System Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$50 - $200
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
✅ Yes
Save money
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 B1278 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The immobilizer system has detected a malfunction, preventing the engine from starting. This code is often caused by a faulty immobilizer key fob, antenna, or receiver.
⚠️

Symptoms

  • • Engine won't start
  • • immobilizer light on dashboard
🔍

Common Causes

  • • Faulty immobilizer key fob
  • • antenna
  • • or receiver
  • • low battery in key fob
  • • incorrect key fob programming
🛠️

How to Fix B1278 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check key fob battery level and replace if necessary. 2. Try reprogramming the key fob. 3. Replace the immobilizer antenna or receiver if faulty.

🔧

Need Maintenance Info for Your SILVERADO 1500 PICKUP?

Get oil capacity, filter specs, and torque settings for your specific 2020 Chevrolet SILVERADO 1500 PICKUP.

View 2020 Chevrolet SILVERADO 1500 PICKUP Specs

Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

immobilizer key fob Shop ↗ antenna Shop ↗ receiver Shop ↗

Essential Tool

Must Have

OBD2 Scanner

Read & clear codes on your 2020 Chevrolet SILVERADO 1500 PICKUP

Shop Scanners ↗
🔗

Related Diagnostic Codes

Other codes that may appear with B1278

B1276 Sequential Code

B1276: Seat Position Sensor Circuit Malfunction

Medium
B1277 Sequential Code

B1277: Exterior Lighting Malfunction

Medium
B1279 Sequential Code

B1279: Audio System Malfunction

Medium
B1280 Sequential Code

B1280: 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