← View Generic B3350 Guide Severity: High
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B3350: B3350: 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 B3350 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The immobilizer system has detected a malfunction, preventing the vehicle from starting. This code is often caused by a faulty immobilizer module, key fob battery issue, or incorrect key fob programming.
⚠️

Symptoms

  • • Vehicle will not start
  • • may display a 'security system malfunction' message on the dashboard
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Common Causes

  • • Faulty immobilizer module
  • • key fob battery issue
  • • incorrect key fob programming
  • • damaged or corroded wiring
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How to Fix B3350 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check key fob battery level and replace if necessary. 2. Check for any signs of corrosion or damage on the wiring and connectors. 3. If issue persists, replace the immobilizer module. 4. If issue still persists, reprogram the key fob.

🔧

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

immobilizer module Shop ↗ key fob Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B3350

B3348 Sequential Code

B3348: Seat Position Sensor Circuit Malfunction

Medium
B3349 Sequential Code

B3349: Exterior Lighting Malfunction

Medium
B3351 Sequential Code

B3351: Audio System Malfunction

Medium
B3352 Sequential Code

B3352: 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