1978 GMC P15 Flywheels
Keep Your 1978 GMC P15 in Top Shape with Quality Flywheels
Whether you’re repairing or upgrading your Flywheel, using high-quality parts is key to keeping your 1978 GMC P15 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Flywheel Ring Gears, Flywheel Bolts, and Flywheel Shims. 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 Flywheels from Trusted Brands
Looking for a reliable Flywheel? We’ve got you covered with options from brands you know and trust like Dorman. For example, Dorman Flywheels start at just $11.49 with an average 4.2 star rating. With over 7 reviews and a solid 3 star average, you can shop with confidence knowing other GMC P15 owners approve.
Competitive Prices and Extensive Inventory
The average price for a 1978 GMC P15 Flywheel at Advance Auto Parts is around $54.49, with a range that starts at $4.49 and goes up to $206.99. With 8 options in stock from 3 trusted brands, finding the right fit is easy. Popular picks like Flywheel Dust Cover, Flywheel Ring Gear, and Automatic Transmission Flex Plate start at just $29.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Flywheel, don’t forget to check out other key components like Clutch Kits and Clutch Release Bearings. At Advance Auto Parts, we’re here to help you keep your 1978 GMC P15 in peak condition, inside and out.
Find Your Specific 1978 GMC P15 Flywheels
Looking for the perfect Flywheel for your 1978 GMC P15? You’re in the right place. Below, you’ll find links to various types of Flywheels that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Flywheels, ensuring durability and a precise fit for your GMC P15. Whether you’re driving a 1978 model or another popular model year like
1975,
1976, and
1977, we’ve got you covered. Purchasing Flywheels from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Flywheels that fit your vehicle.
Essential 1978 GMC P15 Flywheels
Dorman – Flywheel Bolts – Thread Size 7/16-20; Thread Length 0.900 In. (Sold by each) (Part No.678-154)
from
$4.49
This clutch flywheel bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
Product Features:
See More
Product Features:
- Direct replacement – this clutch flywheel bolt matches the fit and function of the factory part on specified years, makes and models
- Ideal solution – this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue
- Durable construction – this part is made from quality materials to ensure reliable performance and long service life
- Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
- Thread Size: 7/16-20
- Tread Length: 0.900 in.
- SAE
- PLEASE NOTE: Item priced and sold by each. See store for details.
Dorman – Help – Flywheel Bolts (Part No.14557)
from
$11.49
This clutch flywheel bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
Product Features:
See More
Product Features:
- Direct replacement – this clutch flywheel bolt matches the fit and function of the factory part on specified years, makes and models
- Ideal solution – this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue
- Durable construction – this part is made from quality materials to ensure reliable performance and long service life
- Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
Dorman – Help – Flywheel Bolts Thread 7/16-20, Length .900 In. (22.86mm), Head Thickness .190 In (Part No.74070)
from
$12.99
This clutch flywheel bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
Product Features:
See More
Product Features:
- Direct replacement – this clutch flywheel bolt matches the fit and function of the factory part on specified years, makes and models
- Ideal solution – this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue
- Durable construction – this part is made from quality materials to ensure reliable performance and long service life
- Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
Mr. Gasket – Flywheel Dust Cover (Part No.5135)
from
$69.99
Keeps dust, rocks, and debris out of the flex plate and torque converter. *Needs modification for Olds/Pontiac Starters on the driver’s side.
Product Features:
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Product Features:
- Heavy Gauge Chrome Plated Steel
- Direct Replacement Bolt On
ATP – FLYWHEEL SHIM (Part No.GS-10)
from
$26.99
FLYWHEEL SHIM
ATP – Flywheel Ring Gear (Part No.ZA-500)
from
$29.99
The ring gear has teeth which engage with the starter motor allowing the engine to crank over and start. Repeated engagement with the starter results in worn or broken ring gear teeth. Once this is diagnosed, the ring gear must be replaced. ATP ring gears are designed to fit and function just like the original part to ensure durability and long life.
Product Features:
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Product Features:
- Manufactured to meet or exceed original equipment specs
- Eliminates grinding from damaged teeth
- Increases starter drive life
ATP – M/T FLYWHEEL (Part No.Z-295)
from
$206.99
M/T FLYWHEEL
ATP – Automatic Transmission Flex Plate (Part No.Z-155)
from
$72.99
Vehicles with automatic transmissions have a flex plate. The flex plates connects the engine and transmission. Most flex plates are made of a thick piece of sheet metal with bolt holes for the torque converter and teeth for the starter. The job of a flex plate is to allow for expansion of the torque converter as engine RPM increases. The constant expansion and contraction of a flex plate over time can result cracks and/or shearing of the flex plate. A damaged flex plate can create serious (expensive) damage. Broken flex plates can not be repaired, they must be replaced. ATP flex plates are made of high quality steel and contain the correct bolt hole spacing and ring gear teeth just like the original part to ensure long life and durability
Product Features:
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Product Features:
- Balanced to factory specs
- Fit and function like the original parts
- Restores normal operation
Popular 1978 GMC P15 Flywheels Categories
Most Popular Flywheel Ring Gear for 1978 GMC P15s
Enhance your 1978 GMC P15 with this popular Flywheel Ring Gear we have in stock, for $29.99.
ATP – Flywheel Ring Gear (Part No.ZA-500)
from
$29.99
The ring gear has teeth which engage with the starter motor allowing the engine to crank over and start. Repeated engagement with the starter results in worn or broken ring gear teeth. Once this is diagnosed, the ring gear must be replaced. ATP ring gears are designed to fit and function just like the original part to ensure durability and long life.
Product Features:
See More
Product Features:
- Manufactured to meet or exceed original equipment specs
- Eliminates grinding from damaged teeth
- Increases starter drive life
Best-Selling 1978 GMC P15 Flywheel Bolts
Upgrade your P15 with one of our 3 best-selling Flywheel Bolts, earning an average 3.5 stars rating across 6 reviews.
Dorman – Help – Flywheel Bolts (Part No.14557)
from
$11.49
This clutch flywheel bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
Product Features:
See More
Product Features:
- Direct replacement – this clutch flywheel bolt matches the fit and function of the factory part on specified years, makes and models
- Ideal solution – this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue
- Durable construction – this part is made from quality materials to ensure reliable performance and long service life
- Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
Dorman – Help – Flywheel Bolts Thread 7/16-20, Length .900 In. (22.86mm), Head Thickness .190 In (Part No.74070)
from
$12.99
This clutch flywheel bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
Product Features:
See More
Product Features:
- Direct replacement – this clutch flywheel bolt matches the fit and function of the factory part on specified years, makes and models
- Ideal solution – this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue
- Durable construction – this part is made from quality materials to ensure reliable performance and long service life
- Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
Dorman – Flywheel Bolts – Thread Size 7/16-20; Thread Length 0.900 In. (Sold by each) (Part No.678-154)
from
$4.49
This clutch flywheel bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
Product Features:
See More
Product Features:
- Direct replacement – this clutch flywheel bolt matches the fit and function of the factory part on specified years, makes and models
- Ideal solution – this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue
- Durable construction – this part is made from quality materials to ensure reliable performance and long service life
- Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
- Thread Size: 7/16-20
- Tread Length: 0.900 in.
- SAE
- PLEASE NOTE: Item priced and sold by each. See store for details.
Top-Quality Flywheel Shims for 1978 GMC P15s
Choose a high-quality OEM or aftermarket Flywheel Shim for GMC P15s and enjoy top-notch performance from $26.99.
ATP – FLYWHEEL SHIM (Part No.GS-10)
from
$26.99
FLYWHEEL SHIM
Our Top Pick for a 1978 GMC P15 Clutch Flywheel Cover
Invest in a
durable Clutch Flywheel Cover for your 1978 GMC, knowing you’re getting trusted brands and expert craftsmanship.
Mr. Gasket – Flywheel Dust Cover (Part No.5135)
from
$69.99
Keeps dust, rocks, and debris out of the flex plate and torque converter. *Needs modification for Olds/Pontiac Starters on the driver’s side.
Product Features:
See More
Product Features:
- Heavy Gauge Chrome Plated Steel
- Direct Replacement Bolt On
Flywheels and Flexplates for 1978 GMC P15s
Make a smart move for your 1978 GMC P15 with products all priced from $72.99 to $206.99.
ATP – M/T FLYWHEEL (Part No.Z-295)
from
$206.99
M/T FLYWHEEL
ATP – Automatic Transmission Flex Plate (Part No.Z-155)
from
$72.99
Vehicles with automatic transmissions have a flex plate. The flex plates connects the engine and transmission. Most flex plates are made of a thick piece of sheet metal with bolt holes for the torque converter and teeth for the starter. The job of a flex plate is to allow for expansion of the torque converter as engine RPM increases. The constant expansion and contraction of a flex plate over time can result cracks and/or shearing of the flex plate. A damaged flex plate can create serious (expensive) damage. Broken flex plates can not be repaired, they must be replaced. ATP flex plates are made of high quality steel and contain the correct bolt hole spacing and ring gear teeth just like the original part to ensure long life and durability
Product Features:
See More
Product Features:
- Balanced to factory specs
- Fit and function like the original parts
- Restores normal operation
Top-Rated Flywheel Brands For Your 1978 GMC P15
When it comes to finding the perfect Flywheel for your 1978 GMC P15, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 3 trusted brands. We carry the most popular Flywheel brands including Dorman, and more, all known for their exceptional customer ratings (average brand rating of 4.2 stars) and competitive prices, as low as $11.49. Purchasing a Flywheel from us here at Advance Auto Parts is a smart move for both you and your 1978 GMC P15, providing peace of mind with parts that meet or exceed OEM standards.
Popular Dorman 1978 GMC P15 Flywheels
If you’re looking for a top-quality Flywheel for your 1978 GMC P15, Advance Auto Parts has exactly what you need with our selection of Dorman Flywheels. We have 1 Dorman Flywheels in stock for this fitment, all known for their durability and precision fit. With prices starting at just $11.49, you’ll find the perfect Flywheel for your needs and budget. Dorman Flywheels for the 1978 GMC P15 come highly rated, with over 4 customer reviews and an impressive average rating of 4.2 stars. Choosing a Dorman Flywheel from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
FAQs for 1978 GMC P15 Flywheels
What are the best-selling Flywheels for 1978 GMC P15s?
Out of 8 Flywheels that fit 1978 GMC P15s, the following parts are the top sellers:
- Flywheel Dust Cover (10648807) – $69.99
- Flywheel Ring Gear (3923452) – $29.99
- Automatic Transmission Flex Plate (3922685) – $72.99
What’s the price range for 1978 GMC P15 Flywheels?
The prices of Flywheels for the 1978 GMC P15 range from $4.49 up to $206.99 for the most premium parts.
What is the average price of a Flywheel for a 1978 GMC P15?
The average price for Flywheels for the 1978 GMC P15 is $54.49. Keep in mind the variety of part types within our Flywheel category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Flywheels for other GMC P15 model years?
What are the cheapest Flywheels for my 1978 GMC P15?
The cheapest 1978 GMC P15 Flywheels we carry are:
- Flywheel Bolts – Thread Size 7/16-20; Thread Length 0.900 In. (Sold by each) (22142246) – $4.49
- Flywheel Bolts (12029427) – $11.49
- Flywheel Bolts Thread 7/16-20, Length .900 In. (22.86mm), Head Thickness .190 In (12017453) – $12.99
- FLYWHEEL SHIM (10860941) – $26.99
- Flywheel Ring Gear (3923452) – $29.99
Does Advance Auto Parts sell Flywheels for any other 1978 GMC models?
Yes. We stock Flywheels for 12 other popular 1978 GMC models. Some of the most popular are 1978 Jimmy Flywheels, 1978 Caballero Flywheels, 1978 K25 Flywheels, 1978 K15 Flywheels, and 1978 G25 Flywheels.
What are the top-rated Flywheels that fit the 1978 GMC P15?
The one 1978 GMC P15 Flywheel we have in stock is the Flywheel Bolts – Thread Size 7/16-20; Thread Length 0.900 In. (Sold by each). It costs $4.49.
What types of Flywheels do you sell for my 1978 GMC P15?
As of 11/2/25, these are some of the most in-demand types of Flywheels for a 1978 GMC P15:
Can I get help with 1978 GMC P15 Flywheel orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about GMC Flywheels and more.
What is your return policy for GMC P15 Flywheels?
Advance Auto Parts keeps returns simple. For new GMC P15 Flywheels and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.