2020 Chevrolet Silverado Engine Misfire Problems – Causes, Fix and Repair Guide

Problem Overview

Possible engine misfire issues with the 2020 Chevrolet Silverado include engine shuddering, hesitation, or even loss of power when accelerating. Other drivers may experience engine shaking, poor engine responsiveness, or a flashing check engine light when driving their car. Misfires that occur regularly could lead to damage to the catalytic converter and engine parts, which would be costly to repair.

The information provided here is sourced from the official Workshop Manual used by technicians and dealerships to diagnose and repair the Silverado. It’s an essential guide for any owner – Click here to get the Chevrolet Silverado Service and Repair Manual.

Engines Covered

4.3L V6 EcoTec3
5.3L V8 EcoTec3
6.2L V8 EcoTec3
Duramax 3.0L Diesel I6

Common Symptoms

The most common symptoms include rough idling, vibrations within the engine, lack of power while accelerating, poor mileage, and a flickering engine check light. Others may observe difficulty in starting the car and hesitations when going up hills or towing something. In some severe cases, the car might go into reduced power mode.

What Causes 2020 Chevrolet Silverado Engine Misfire Problems

These common causes include faulty spark plugs, failing ignition coils, dirty fuel injectors, and vacuum leaks. For diesel engines, other causes may include imbalanced injectors and fuel injection problems. Low fuel pressure or even bad fuel quality can be potential causes of engine misfires as well.

A diagnostic procedure would first include performing a scan on the car using an OBD2 diagnostic tool to determine misfire codes. Checking the condition of the spark plugs and ignition coils is next. Checking the injectors and measuring fuel pressure are next.

How to Fix 2020 Chevrolet Silverado Engine Misfire Problems

Depending on the cause, you may need to

  • Replace spark plugs
  • Replace ignition coils
  • Clean or replace fuel injectors
  • Repair vacuum leaks
  • Replace fuel pump or fuel filter
  • Reprogram engine control module (in rare cases)

Parts You May Need and Where to Buy Them

  • Spark plugs
  • Ignition coils
  • Fuel injectors
  • Intake manifold gasket
  • Fuel pump assembly
  • Vacuum hoses and connectors

If you’re planning to buy one, be sure to check out our complete buyer’s guide for the Chevrolet Silverado, covering common problems, features, maintenance costs and what to look out for before purchasing.