← View Generic B1077 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1077: B1077: Malfunction Indicator Lamp (MIL) Circuit Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$20 - $50
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 B1077 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B1077 code indicates a malfunction in the Malfunction Indicator Lamp (MIL) circuit, which is responsible for illuminating the 'Check Engine' light on the dashboard.
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Symptoms

  • • Check Engine light is illuminated
  • • no other symptoms
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Common Causes

  • • Faulty MIL bulb
  • • MIL circuit wiring issue
  • • faulty body control module
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How to Fix B1077 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the MIL bulb for proper installation and function. Replace if necessary. 2. Inspect the MIL circuit wiring for any signs of damage or corrosion. Repair or replace as needed. 3. Check the body control module for any fault codes. Clear any stored codes and retest.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

MIL bulb Shop ↗ MIL circuit wiring harness Shop ↗

Essential Tool

Must Have

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Related Diagnostic Codes

Other codes that may appear with B1077

B1075 Sequential Code

B1075: Power Window Relay Circuit Malfunction

Medium
B1076 Sequential Code

B1076: Seat Switch Circuit Malfunction

Medium
B1078 Sequential Code

B1078: Body Control Module (BCM) Security Malfunction

Medium
B1079 Sequential Code

B1079: Audio System 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