← View Generic B1662 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1662: B1662: Body System Security 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 B1662 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B1662 code indicates a malfunction in the vehicle's security system, which may cause issues with door locks, alarm systems, or other security-related functions.
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Symptoms

  • • Difficulty locking/unlocking doors
  • • alarm system malfunction
  • • security light on dashboard
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Common Causes

  • • Faulty security module
  • • wiring issue
  • • faulty door lock actuator
  • • incorrect security system configuration
🛠️

How to Fix B1662 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check security system configuration and reset if necessary. 2. Inspect and repair or replace faulty wiring. 3. Replace faulty security module. 4. Replace faulty door lock actuator.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Security module Shop ↗ Wiring harness Shop ↗ Door lock actuator Shop ↗

Essential Tool

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Related Diagnostic Codes

Other codes that may appear with B1662

B1660 Sequential Code

B1660: Seat Position Sensor Circuit Malfunction

Medium
B1661 Sequential Code

B1661: Body Control Module (BCM) Malfunction - Lighting

Medium
B1663 Sequential Code

B1663: Audio System Malfunction

Medium
B1664 Sequential Code

B1664: 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