← View Generic B0966 Guide Severity: High
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0966: B0966: Immobilizer System Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$200 - $1000
Parts & Labor
Difficulty
4/5
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 B0966 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 an incorrect key or a faulty keyless entry system.
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Symptoms

  • • Vehicle will not start
  • • or will not run
  • • due to immobilizer system malfunction
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Common Causes

  • • Faulty immobilizer system
  • • incorrect or damaged key
  • • faulty keyless entry system
  • • or wiring issues
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How to Fix B0966 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the keyless entry system for any issues or damage. 2. Try to start the vehicle with a spare key to verify if the issue is with the key or the immobilizer system. 3. Check the wiring and connections to the immobilizer system for any damage or corrosion. 4. Replace the immobilizer system 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 system module Shop ↗ Keyless entry system module Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B0966

B0964 Sequential Code

B0964: Seat Adjuster System Malfunction

Medium
B0965 Sequential Code

B0965: Exterior Lighting Malfunction

Medium
B0967 Sequential Code

B0967: Audio System Malfunction

Medium
B0968 Sequential Code

B0968: 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