← View Generic B0974 Guide Severity: High
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0974: B0974: 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 B0974 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The immobilizer system has malfunctioned, preventing the vehicle from starting or running. This code indicates a problem with the immobilizer system's communication with the engine control module.
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Symptoms

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

  • • Faulty immobilizer key fob
  • • damaged or corroded wiring
  • • faulty immobilizer module
  • • or a problem with the engine control module's communication with the immobilizer system
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How to Fix B0974 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the immobilizer key fob for damage or corrosion. Replace if necessary. 2. Inspect and clean the wiring harness for corrosion or damage. 3. Check the immobilizer module for faults and replace if necessary. 4. Update the engine control module's software if necessary.

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Need Maintenance Info for Your SILVERADO 1500 PICKUP?

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

immobilizer key fob Shop ↗ wiring harness Shop ↗ immobilizer module Shop ↗

Essential Tool

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OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B0974

B0972 Sequential Code

B0972: Seat Position Sensor Circuit Malfunction

Medium
B0973 Sequential Code

B0973: Exterior Lighting Malfunction

Medium
B0975 Sequential Code

B0975: Audio System Fault

Medium
B0976 Sequential Code

B0976: 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