← View Generic B1694 Guide Severity: High
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1694: B1694: 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 B1694 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The immobilizer system has detected a malfunction, preventing the engine from starting. This code is typically set when the immobilizer system is not functioning correctly, preventing the engine from starting.
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Symptoms

  • • Engine will not start
  • • immobilizer light on dashboard
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Common Causes

  • • Faulty immobilizer module
  • • faulty key fob
  • • low battery voltage
  • • wiring issues
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How to Fix B1694 on 2020 Chevrolet SILVERADO 1500 PICKUP

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

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

immobilizer module Shop ↗ key fob Shop ↗

Essential Tool

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OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B1694

B1692 Sequential Code

B1692: Seat Position Sensor Circuit Malfunction

Medium
B1693 Sequential Code

B1693: Body Control Module (BCM) Lighting Circuit Malfunction

Medium
B1695 Sequential Code

B1695: Audio System Fault

Medium
B1696 Sequential Code

B1696: 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