← View Generic B1603 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1603: B1603: Power Window Circuit 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 B1603 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B1603 code indicates a problem with the power window circuit, which can cause windows to malfunction or not function at all.
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Symptoms

  • • Windows not moving
  • • stuck or slow
  • • intermittent operation
  • • unusual noises
🔍

Common Causes

  • • Faulty window regulator
  • • damaged or corroded wiring
  • • faulty window switch
  • • blown fuse
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How to Fix B1603 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check and replace blown fuse. 2. Inspect and clean wiring and connectors. 3. Replace faulty window regulator or switch. 4. Test and repair or replace faulty window motor.

🔧

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

window regulator Shop ↗ window switch Shop ↗ wiring harness Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B1603

B1601 Sequential Code

B1601: Climate Control System Malfunction

Medium
B1602 Sequential Code

B1602: Door Locks Malfunction

Medium
B1604 Sequential Code

B1604: Seat Switch Circuit Malfunction

Medium
B1605 Sequential Code

B1605: Body Control Module (BCM) Lighting Circuit Malfunction

Medium

💡 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