← View Generic B1174 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1174: B1174: 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 B1174 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B1174 code indicates a malfunction in the vehicle's security system, which can cause issues with door locks, alarm systems, and other security-related functions.
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Symptoms

  • • Door locks may not function properly
  • • alarm system may not activate
  • • or security lights may flash erratically.
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Common Causes

  • • Faulty security module
  • • wiring issues
  • • or a malfunctioning door lock actuator.
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How to Fix B1174 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the security module for any signs of physical damage or corrosion. Replace if necessary. 2. Inspect wiring harnesses for any signs of damage or corrosion. Repair or replace as needed. 3. Test door lock actuators to ensure proper function. Replace if faulty.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

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

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B1174

B1172 Sequential Code

B1172: Seat Adjustment Motor Fault

Medium
B1173 Sequential Code

B1173: Turn Signal Bulb Out or Faulty

Medium
B1175 Sequential Code

B1175: Audio System Fault

Medium
B1176 Sequential Code

B1176: Airbag System Circuit Short to Voltage

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