← View Generic B2790 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B2790: B2790: 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 B2790 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The body control module (BCM) has detected a security-related issue, such as a faulty door ajar switch or a malfunctioning alarm system.
⚠️

Symptoms

  • • Alarm system activation
  • • door locks not functioning
  • • or dashboard warning lights illuminated.
🔍

Common Causes

  • • Faulty door ajar switch
  • • malfunctioning alarm system
  • • or a problem with the BCM's security communication protocol.
🛠️

How to Fix B2790 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the door ajar switches for proper operation and clean or replace them if necessary. 2. Inspect the alarm system wiring and connections for damage or corrosion. 3. Update the BCM's software if necessary. 4. Replace the BCM if it's faulty.

🔧

Need Maintenance Info for Your SILVERADO 1500 PICKUP?

Get oil capacity, filter specs, and torque settings for your specific 2020 Chevrolet SILVERADO 1500 PICKUP.

View 2020 Chevrolet SILVERADO 1500 PICKUP Specs

Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Door ajar switch Shop ↗ Alarm system wiring harness Shop ↗ BCM software update Shop ↗

Essential Tool

Must Have

OBD2 Scanner

Read & clear codes on your 2020 Chevrolet SILVERADO 1500 PICKUP

Shop Scanners ↗
🔗

Related Diagnostic Codes

Other codes that may appear with B2790

B2788 Sequential Code

B2788: Seat Switch Circuit Malfunction

Medium
B2789 Sequential Code

B2789: Exterior Lighting Malfunction

Medium
B2791 Sequential Code

B2791: Audio System Fault

Medium
B2792 Sequential Code

B2792: 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