1956 GMC S370 Spark Plugs

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Keep Your 1956 GMC S370 in Top Shape with Quality Spark Plugs

Whether you’re repairing or upgrading your Spark Plug, using high-quality parts is key to keeping your 1956 GMC S370 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Spark Plugs, Spark Plug Wire Separators, and Spark Plug Non-Foulers. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Spark Plugs from Trusted Brands

Looking for a reliable Spark Plug? We’ve got you covered with options from brands you know and trust like ACDelco, Champion, and Autolite. For example, ACDelco Spark Plugs start at just $6.49 with an average 4.7 star rating. Champion and Autolite offer similar pricing and quality, backed by strong customer feedback. With over 80 reviews and a solid 4.8 star average, you can shop with confidence knowing other GMC S370 owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1956 GMC S370 Spark Plug at Advance Auto Parts is around $21.14, with a range that starts at $0.55 and goes up to $213.99. With 10 options in stock from 5 trusted brands, finding the right fit is easy. Popular picks like Champion Copper Plus Small Engine Spark Plug J8C – Dependable Performance & Durability, 841, Autolite Copper Resistor Spark Plug: Quick Starts & Enhanced Durability, 303, and Champion Copper Plus Small Engine Spark Plug J8C – Dependable Performance & Durability, 841-1 start at just $4.29 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Spark Plug, don’t forget to check out other key components like Distributors and Ignition Coils and Boots. At Advance Auto Parts, we’re here to help you keep your 1956 GMC S370 in peak condition, inside and out.

Essential 1956 GMC S370 Spark Plugs

Dorman – Help – Dorman – Help Spark Plug Non-Foulers – 14mm Gasket Seat, 42000 (Part No.42000)

Dorman - Help Spark Plug Non-Foulers - 14mm Gasket Seat, 42000

from

$7.99
This spark plug non fouler is designed for easy installation on specified vehicles to protect spark plugs from fouling and damage. It is engineered for durability and reliable performance.
See More

Top Street Performance – Top Street Performance Chevy Small Block Long Water Pump Polished Aluminum 10SI Alternator Bracket, JM9101P (Part No.JM9101P)

Top Street Performance Chevy Small Block Long Water Pump Polished Aluminum 10SI Alternator Bracket, JM9101P

from

$58.99
TSP’s billet aluminum brackets are the best option when cleaning up the front of your engine. Precisely CNC-machined from 6061-T6 aluminum, they are guaranteed to provide a perfect fit and secure grip. They are available in multiple high-quality finishes to match your desired aesthetic.
See More

Top Street Performance – Top Street Performance GM Saginaw P Series Style Chrome Power Steering Pump, JM2000C (Part No.JM2000C)

Top Street Performance GM Saginaw P Series Style Chrome Power Steering Pump, JM2000C

from

$213.99
TSP’s Steering Pumps and Boxes are built with high-quality materials to ensure performance and reliability. We have the most popular types to fit many applications, and our chrome pumps will greatly improve the look of any engine.
See More

Autolite – Autolite Copper Resistor Spark Plug: Quick Starts & Enhanced Durability, 303 (Part No.303)

Autolite Copper Resistor Spark Plug: Quick Starts & Enhanced Durability, 303

from

$4.49
Autolite Copper spark plugs are designed to provide reliable performance and long-lasting durability for your vehicle. Featuring a copper core center electrode, these plugs excel in thermal control and resist fouling, ensuring consistent operation. The high nickel alloy center and ground electrodes enhance longevity, while the high alumina multi-rib ceramic insulator boosts thermal conductivity and insulation strength. A nickel-plated shell offers superior corrosion resistance, making these plugs a durable choice for extended use. Engineered for optimal fuel combustion, they contribute to improved fuel efficiency, helping you save at the pump. Additionally, their advanced design ensures smoother and more responsive acceleration, enhancing your driving experience. With a standard center electrode design, short projection, and flat seat type, these spark plugs are built to meet regular-grade requirements while delivering exceptional performance.
See More

ACDelco – ACDelco Conventional Spark Plug, R45 (Part No.R45)

ACDelco Conventional Spark Plug, R45

from

$6.49
ACDelco Gold (Professional) Conventional Spark Plugs are a high quality alternative to Original Equipment (OE) parts. These Conventional Spark Plugs are designed for reliability and efficient performance, and are the high quality replacements for many vehicles on the road today. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance. They are also available for Marine applications. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.
See More

Autolite – Autolite Copper Resistor Spark Plug: Quick Starts & Enhanced Durability, 306 (Part No.306)

Autolite Copper Resistor Spark Plug: Quick Starts & Enhanced Durability, 306

from

$1.99
Autolite Copper spark plugs are expertly crafted to deliver reliable quick starts and the power your vehicle demands for optimal performance. Featuring a copper core center electrode, these plugs excel in thermal control and resist fouling, ensuring consistent operation. The high nickel alloy center and ground electrodes are designed for extended life, while the high alumina multi-rib ceramic insulator enhances thermal conductivity and insulation strength. With a corrosion-resistant nickel-plated shell, these spark plugs offer exceptional durability over time. Engineered to optimize fuel efficiency, they help you achieve better mileage while providing smoother acceleration for an improved driving experience. Meeting or exceeding Original Equipment Service (OES) design Standards, these spark plugs ensure high-quality performance and compatibility. The gasket seat type ensures a secure seal for optimal engine function, while the short projection standard center electrode design and nickel tip materials further enhance reliability. Ideal for regular-grade applications, these spark plugs are a dependable choice for maintaining your vehicle’s performance.
See More

Champion – Champion Copper Plus Small Engine Spark Plug J8C – Dependable Performance & Durability, 841-1 (Part No.841-1)

Champion Copper Plus Small Engine Spark Plug J8C - Dependable Performance & Durability, 841-1

from

$4.29
Champion Copper Plus spark plugs deliver dependable ignition performance with proven copper-core technology. The copper core electrode provides excellent conductivity and optimized heat control for consistent sparks while the coated shell protects against corrosion. Champion your engine with spark plugs engineered to improve efficiency and keep your vehicle running at its best.
See More

ACDelco – ACDelco Conventional Nickel Tip Copper Core Spark Plug: Reduces Corrosion & Maximizes Durability, R43 (Part No.R43)

ACDelco Conventional Nickel Tip Copper Core Spark Plug: Reduces Corrosion & Maximizes Durability, R43

from

$6.49
ACDelco Professional Conventional Spark Plugs are designed for reliability and efficient performance, and are a high quality replacement for many vehicles on the road today. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance. They are also available for Marine applications. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function.
See More

Autolite – Autolite Copper Non-Resistor Spark Plug: Quick Starts & Reliable Performance, 295DP (Part No.295DP)

Autolite Copper Non-Resistor Spark Plug: Quick Starts & Reliable Performance, 295DP

from

$1.99
Autolite Small Engine spark plugs are the perfect solution for keeping your outdoor equipment running smoothly and efficiently. Designed with a high nickel alloy center and ground electrode, these spark plugs deliver extended life and reliable performance for mowers, tractors, chainsaws, snowblowers, leaf blowers, and more. The multi-rib ceramic insulator minimizes the risk of flash-over, while the copper-glass seal ensures a gas-tight bond between the center electrode and terminal post for optimal functionality. Featuring a cold-formed steel shell with precision-rolled threads, these plugs offer enhanced durability and reduced wear, making them a dependable choice for regular-grade applications. With a flat seat type and short projection center electrode, they are engineered for consistent ignition and long-lasting performance. Trust these nickel-tipped spark plugs to keep your small engines operating at their best, season after season.
See More

Champion – Champion Copper Plus Small Engine Spark Plug J8C – Dependable Performance & Durability, 841 (Part No.841)

Champion Copper Plus Small Engine Spark Plug J8C - Dependable Performance & Durability, 841

from

$4.49
Champion Copper Plus spark plugs deliver dependable ignition performance with proven copper-core technology. The copper core electrode provides excellent conductivity and optimized heat control for consistent sparks while the coated shell protects against corrosion. Champion your engine with spark plugs engineered to improve efficiency and keep your vehicle running at its best.
See More

Most Popular Spark Plugs for 1956 GMC S370s

Enhance your 1956 GMC S370 with one of the 7 Spark Plugs we have in stock, starting at just $1.99.

ACDelco – ACDelco Conventional Spark Plug, R45 (Part No.R45)

ACDelco Conventional Spark Plug, R45

from

$6.49
ACDelco Gold (Professional) Conventional Spark Plugs are a high quality alternative to Original Equipment (OE) parts. These Conventional Spark Plugs are designed for reliability and efficient performance, and are the high quality replacements for many vehicles on the road today. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance. They are also available for Marine applications. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.
See More

ACDelco – ACDelco Conventional Nickel Tip Copper Core Spark Plug: Reduces Corrosion & Maximizes Durability, R43 (Part No.R43)

ACDelco Conventional Nickel Tip Copper Core Spark Plug: Reduces Corrosion & Maximizes Durability, R43

from

$6.49
ACDelco Professional Conventional Spark Plugs are designed for reliability and efficient performance, and are a high quality replacement for many vehicles on the road today. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance. They are also available for Marine applications. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function.
See More

Champion – Champion Copper Plus Small Engine Spark Plug J8C – Dependable Performance & Durability, 841 (Part No.841)

Champion Copper Plus Small Engine Spark Plug J8C - Dependable Performance & Durability, 841

from

$4.49
Champion Copper Plus spark plugs deliver dependable ignition performance with proven copper-core technology. The copper core electrode provides excellent conductivity and optimized heat control for consistent sparks while the coated shell protects against corrosion. Champion your engine with spark plugs engineered to improve efficiency and keep your vehicle running at its best.
See More

Champion – Champion Copper Plus Small Engine Spark Plug J8C – Dependable Performance & Durability, 841-1 (Part No.841-1)

Champion Copper Plus Small Engine Spark Plug J8C - Dependable Performance & Durability, 841-1

from

$4.29
Champion Copper Plus spark plugs deliver dependable ignition performance with proven copper-core technology. The copper core electrode provides excellent conductivity and optimized heat control for consistent sparks while the coated shell protects against corrosion. Champion your engine with spark plugs engineered to improve efficiency and keep your vehicle running at its best.
See More

Autolite – Autolite Copper Resistor Spark Plug: Quick Starts & Enhanced Durability, 306 (Part No.306)

Autolite Copper Resistor Spark Plug: Quick Starts & Enhanced Durability, 306

from

$1.99
Autolite Copper spark plugs are expertly crafted to deliver reliable quick starts and the power your vehicle demands for optimal performance. Featuring a copper core center electrode, these plugs excel in thermal control and resist fouling, ensuring consistent operation. The high nickel alloy center and ground electrodes are designed for extended life, while the high alumina multi-rib ceramic insulator enhances thermal conductivity and insulation strength. With a corrosion-resistant nickel-plated shell, these spark plugs offer exceptional durability over time. Engineered to optimize fuel efficiency, they help you achieve better mileage while providing smoother acceleration for an improved driving experience. Meeting or exceeding Original Equipment Service (OES) design Standards, these spark plugs ensure high-quality performance and compatibility. The gasket seat type ensures a secure seal for optimal engine function, while the short projection standard center electrode design and nickel tip materials further enhance reliability. Ideal for regular-grade applications, these spark plugs are a dependable choice for maintaining your vehicle’s performance.
See More

Autolite – Autolite Copper Resistor Spark Plug: Quick Starts & Enhanced Durability, 303 (Part No.303)

Autolite Copper Resistor Spark Plug: Quick Starts & Enhanced Durability, 303

from

$4.49
Autolite Copper spark plugs are designed to provide reliable performance and long-lasting durability for your vehicle. Featuring a copper core center electrode, these plugs excel in thermal control and resist fouling, ensuring consistent operation. The high nickel alloy center and ground electrodes enhance longevity, while the high alumina multi-rib ceramic insulator boosts thermal conductivity and insulation strength. A nickel-plated shell offers superior corrosion resistance, making these plugs a durable choice for extended use. Engineered for optimal fuel combustion, they contribute to improved fuel efficiency, helping you save at the pump. Additionally, their advanced design ensures smoother and more responsive acceleration, enhancing your driving experience. With a standard center electrode design, short projection, and flat seat type, these spark plugs are built to meet regular-grade requirements while delivering exceptional performance.
See More

Autolite – Autolite Copper Non-Resistor Spark Plug: Quick Starts & Reliable Performance, 295DP (Part No.295DP)

Autolite Copper Non-Resistor Spark Plug: Quick Starts & Reliable Performance, 295DP

from

$1.99
Autolite Small Engine spark plugs are the perfect solution for keeping your outdoor equipment running smoothly and efficiently. Designed with a high nickel alloy center and ground electrode, these spark plugs deliver extended life and reliable performance for mowers, tractors, chainsaws, snowblowers, leaf blowers, and more. The multi-rib ceramic insulator minimizes the risk of flash-over, while the copper-glass seal ensures a gas-tight bond between the center electrode and terminal post for optimal functionality. Featuring a cold-formed steel shell with precision-rolled threads, these plugs offer enhanced durability and reduced wear, making them a dependable choice for regular-grade applications. With a flat seat type and short projection center electrode, they are engineered for consistent ignition and long-lasting performance. Trust these nickel-tipped spark plugs to keep your small engines operating at their best, season after season.
See More

Best-Selling 1956 GMC S370 Spark Plug Wire Separators

Upgrade your S370 with one of our 2 best-selling Spark Plug Wire Separators.

Top Street Performance – Top Street Performance GM Saginaw P Series Style Chrome Power Steering Pump, JM2000C (Part No.JM2000C)

Top Street Performance GM Saginaw P Series Style Chrome Power Steering Pump, JM2000C

from

$213.99
TSP’s Steering Pumps and Boxes are built with high-quality materials to ensure performance and reliability. We have the most popular types to fit many applications, and our chrome pumps will greatly improve the look of any engine.
See More

Top Street Performance – Top Street Performance Chevy Small Block Long Water Pump Polished Aluminum 10SI Alternator Bracket, JM9101P (Part No.JM9101P)

Top Street Performance Chevy Small Block Long Water Pump Polished Aluminum 10SI Alternator Bracket, JM9101P

from

$58.99
TSP’s billet aluminum brackets are the best option when cleaning up the front of your engine. Precisely CNC-machined from 6061-T6 aluminum, they are guaranteed to provide a perfect fit and secure grip. They are available in multiple high-quality finishes to match your desired aesthetic.
See More

Top-Quality Spark Plug Non-Foulers for 1956 GMC S370s

Choose a high-quality OEM or aftermarket Spark Plug Non-Fouler for GMC S370s and enjoy top-notch performance from $7.99.

Dorman – Help – Dorman – Help Spark Plug Non-Foulers – 14mm Gasket Seat, 42000 (Part No.42000)

Dorman - Help Spark Plug Non-Foulers - 14mm Gasket Seat, 42000

from

$7.99
This spark plug non fouler is designed for easy installation on specified vehicles to protect spark plugs from fouling and damage. It is engineered for durability and reliable performance.
See More

Top-Rated Spark Plug Brands For Your 1956 GMC S370

When it comes to finding the perfect Spark Plug for your 1956 GMC S370, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 5 trusted brands. We carry the most popular Spark Plug brands including Champion, ACDelco, and Autolite, and more, all known for their exceptional customer ratings (average brand rating of 4.8 stars) and competitive prices, as low as $1.99. Purchasing a Spark Plug from us here at Advance Auto Parts is a smart move for both you and your 1956 GMC S370, providing peace of mind with parts that meet or exceed OEM standards.

Popular Champion 1956 GMC S370 Spark Plugs

If you’re looking for a top-quality Spark Plug for your 1956 GMC S370, Advance Auto Parts has exactly what you need with our selection of Champion Spark Plugs. We have 2 Champion Spark Plugs in stock for this fitment, all known for their durability and precision fit. With prices starting at just $4.29 and an average cost of $4.39, you’ll find the perfect Spark Plug for your needs and budget. Champion Spark Plugs for the 1956 GMC S370 come highly rated, with over 14 customer reviews and an impressive average rating of 4.8 stars. Choosing a Champion Spark Plug from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Champion Copper Plus Small Engine Spark Plug J8C - Dependable Performance & Durability, 841
from $4.49
(13)
Champion Copper Plus Small Engine Spark Plug J8C – Dependable Performance & Durability, 841
“Ready for me within one hour. No problem!”
Champion Copper Plus Small Engine Spark Plug J8C - Dependable Performance & Durability, 841-1
from $4.29
(1)
Champion Copper Plus Small Engine Spark Plug J8C – Dependable Performance & Durability, 841-1
“Only Advance carried this hard to find plug. It works as it should.”

Top-Quality ACDelco 1956 GMC S370 Spark Plugs

For those in search of a high-quality Spark Plug for their 1956 GMC S370, Advance Auto Parts offers a great selection of ACDelco Spark Plugs. With 2 ACDelco Spark Plugs in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Spark Plugs start at just $6.49, giving you a range of options to suit your budget. Backed by over 17 customer ratings and an average rating of 4.7 stars, ACDelco Spark Plugs provide both reliability and excellent performance. Choosing a ACDelco Spark Plug from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
ACDelco Conventional Spark Plug, R45
from $6.49
(15)
ACDelco Conventional Spark Plug, R45
“Plug works great for an upgrade or OEM replacemant and will outlast standard plugs with improved reliability. Very good for the price”

FAQs for 1956 GMC S370 Spark Plugs

What are the best-selling Spark Plugs for 1956 GMC S370s?

What’s the price range for 1956 GMC S370 Spark Plugs?

The prices of Spark Plugs for the 1956 GMC S370 range from $0.55 up to $213.99 for the most premium parts.

What is the average price of a Spark Plug for a 1956 GMC S370?

The average price for Spark Plugs for the 1956 GMC S370 is $21.14. Keep in mind the variety of part types within our Spark Plug category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Spark Plugs for other GMC S370 model years?

Yes, we carry Spark Plugs for 7 model years of GMC S370s between 1951 and 1959. The following model years are the most popular for Spark Plug purchases: 1959, 1958, 1957, 1955, 1954, 1953, 1952, and 1951.

Does Advance Auto Parts sell Spark Plugs for any other 1956 GMC models?

Yes. We stock Spark Plugs for 17 other popular 1956 GMC models. Some of the most popular are 1956 Truck Spark Plugs, 1956 100 Spark Plugs, 1956 150 Spark Plugs, 1956 250 Spark Plugs, and 1956 300 Spark Plugs.

What are the top-rated Spark Plugs that fit the 1956 GMC S370?

Based on 80 reviews by customers, our 1956 GMC S370 Spark Plugs have an average customer rating of 4.8 stars. These are the highest-rated categories of Spark Plugs for the 1956 GMC S370 and their top-rated products:

What types of Spark Plugs do you sell for my 1956 GMC S370?

As of 8/2/26, these are some of the most in-demand types of Spark Plugs for a 1956 GMC S370:

Can I get help with 1956 GMC S370 Spark Plug orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about GMC Spark Plugs and more.

What is your return policy for GMC S370 Spark Plugs?

Advance Auto Parts keeps returns simple. For new GMC S370 Spark Plugs and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.