← View Generic B1798 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1798: B1798: 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 B1798 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The immobilizer system has malfunctioned, preventing the vehicle from starting or running. This code is typically set when the immobilizer system detects a problem with the key fob, ignition switch, or other related components.
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Symptoms

  • • Vehicle won't start
  • • won't crank
  • • or won't run
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Common Causes

  • • Faulty key fob
  • • ignition switch
  • • immobilizer module
  • • or wiring issues
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How to Fix B1798 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the key fob battery level and replace if necessary. 2. Check the ignition switch for any signs of wear or damage. 3. Check the immobilizer module for any signs of malfunction. 4. Check the wiring harness for any signs of damage or corrosion. 5. Clear the code and test the vehicle.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

key fob battery Shop ↗ ignition switch Shop ↗ immobilizer module 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 B1798

B1796 Sequential Code

B1796: Seat Position Sensor Circuit Malfunction

Medium
B1797 Sequential Code

B1797: Exterior Lighting Malfunction

Medium
B1799 Sequential Code

B1799: Audio System Malfunction

Medium
B1800 Sequential Code

B1800: 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