← View Generic B1118 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1118: B1118: Immobilizer System Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$50 - $200
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 B1118 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The immobilizer system has detected a malfunction, preventing the vehicle from starting or running. This code is often related to issues with the immobilizer key fob, keyless entry system, or the vehicle's computer.
⚠️

Symptoms

  • • Vehicle won't start
  • • key fob not recognized
  • • alarm system malfunction
🔍

Common Causes

  • • Faulty key fob
  • • worn-out key fob battery
  • • keyless entry system failure
  • • immobilizer computer malfunction
🛠️

How to Fix B1118 on 2020 Chevrolet SILVERADO 1500 PICKUP

Check and replace the key fob battery if low Reset the immobilizer system using a scan tool Replace the key fob if faulty Update the immobilizer computer software if necessary

🔧

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

key fob Shop ↗ immobilizer computer software update 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 B1118

B1116 Sequential Code

B1116: Seat Switch Circuit Malfunction

Medium
B1117 Sequential Code

B1117: Malfunction of Front Turn Signal Lamp

Medium
B1119 Sequential Code

B1119: Audio System Malfunction

Medium
B1120 Sequential Code

B1120: Airbag System Fault

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