GMC Spark Plug Buyer's Guide

Every internal combustion engine has a set of spark plugs. Even though spark plugs are small, they play a big role in keeping the engine running smoothly. In this guide, we’ll teach you all about spark plugs and help you get the most value for your money when it’s time to replace the spark plugs in your engine.

What are Spark Plugs?

If you could look inside one of the cylinders in your engine, you would find a small electrical tube with a ground electrode and ceramic housing. That’s the spark plug, and its role is to receive the high voltage electric current from the ignition coil and then convert it into a spark. The spark is large enough to start the internal combustion process within the engine. All the spark plugs in your engine work together in a particular order to keep the engine humming along smoothly.

For a more thorough explanation on what spark plugs look like and how they work, check out this article.

How to Inspect Your Spark Plugs

Spark plugs eventually fail from constant exposure to the harsh conditions within the cylinder. When one of your spark plugs fails, you’ll notice a reduction in your engine’s power and an increase in its fuel consumption. Inspecting all of the spark plugs in your engine is the best way to determine if any of them needs to be replaced. Here's a good tutorial on accessing and inspecting your spark plugs.

OEM Vs. Aftermarket Spark Plugs: Which Ones Should You Buy?

When it’s time to replace your spark plugs, the first decision you have to make is whether to get OEM or aftermarket replacement spark plugs. This comparison guide will help you explore both options and learn about why OEM is the superior choice. To sum it up:

OEM spark plugs are more durable
OEM spark plugs won’t interfere with your car’s electrical system
OEM spark plugs are just the right size
OEM spark plugs cost less

How to Replace a Spark Plug in Your GMC Vehicle

Image Credit: PaulsTravelPictures

Replacing the spark plugs in your motor is something you can do at home with the right tools. The process basically involves removing the spark plug, and then putting in the new plug. This tutorial has a list of the necessary tools and all the steps you need to pull off the job like a pro.