← View Generic B2494 Guide Severity: High
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B2494: B2494: Immobilizer System Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$200 - $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 B2494 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
  • • may display a security warning message on the dashboard
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Common Causes

  • • Faulty immobilizer system module
  • • faulty key fob
  • • low battery voltage
  • • faulty wiring or connections
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How to Fix B2494 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the immobilizer system module for any signs of physical damage or corrosion. 2. Check the key fob battery level and replace if necessary. 3. Check the wiring and connections to the immobilizer system module for any signs of damage or corrosion. 4. If the issue persists, replace the immobilizer system module.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Immobilizer system module Shop ↗ Key fob battery Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B2494

B2492 Sequential Code

B2492: Seat Position Sensor Circuit Malfunction

Medium
B2493 Sequential Code

B2493: Exterior Lighting Malfunction

Medium
B2495 Sequential Code

B2495: Audio System Fault

Medium
B2496 Sequential Code

B2496: 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