← View Generic B1782 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1782: B1782: Immobilizer System Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$100 - $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 B1782 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 caused by a faulty immobilizer module, key fob, or battery.
⚠️

Symptoms

  • • Vehicle won't start
  • • remote start doesn't work
  • • alarm sounds continuously
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Common Causes

  • • Faulty immobilizer module
  • • key fob
  • • or battery
  • • low battery voltage
  • • incorrect key fob programming
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How to Fix B1782 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check battery voltage and charge or replace if necessary. 2. Test key fob and replace if faulty. 3. Update immobilizer module software. 4. Replace immobilizer module if faulty.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

immobilizer module Shop ↗ key fob Shop ↗ battery Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B1782

B1780 Sequential Code

B1780: Seat Position Sensor Circuit Malfunction

Medium
B1781 Sequential Code

B1781: Turn Signal Lamp Circuit Malfunction

Medium
B1783 Sequential Code

B1783: Audio System Fault

Medium
B1784 Sequential Code

B1784: 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