1975 GMC K15 Engine Blocks
Keep Your 1975 GMC K15 in Top Shape with Quality Engine Blocks
Whether you’re repairing or upgrading your Engine Block, using high-quality parts is key to keeping your 1975 GMC K15 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Oil Caps and Oil Pump Shafts. 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 Engine Blocks from Trusted Brands
Looking for a reliable Engine Block? We’ve got you covered with options from brands you know and trust like Carquest Premium and Melling. For example, Carquest Premium Engine Blocks start at just $6.99 with an average 4.5 star rating. Melling offer similar pricing and quality, backed by strong customer feedback. With over 96 reviews and a solid 5.0 star average, you can shop with confidence knowing other GMC K15 owners approve.
Competitive Prices and Extensive Inventory
The average price for a 1975 GMC K15 Engine Block at Advance Auto Parts is around $19.84, with a range that starts at $6.99 and goes up to $34.99. With 5 options in stock from 4 trusted brands, finding the right fit is easy. Popular picks like Melling Stock Replacement Type Oil Pump Intermediate Shaft, IS-55E, Melling Stock Replacement Type Oil Pump Intermediate Shaft, IS-55G, and ARP Auto Racing For Use With All Chevy Small Blocks, 8740 Steel, 190000 Psi, 134-7901 start at just $17.79 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Engine Block, don’t forget to check out other key components like Engine Gaskets and Seals and Engine Timing Parts. At Advance Auto Parts, we’re here to help you keep your 1975 GMC K15 in peak condition, inside and out.
Find Your Specific 1975 GMC K15 Engine Blocks
Looking for the perfect Engine Block for your 1975 GMC K15? You’re in the right place. Below, you’ll find links to various types of Engine Blocks that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Engine Blocks, ensuring durability and a precise fit for your GMC K15. Whether you’re driving a 1975 model or another popular model year like
1976,
1977, and
1978, we’ve got you covered. Purchasing Engine Blocks 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 Engine Blocks that fit your vehicle.
Essential 1975 GMC K15 Engine Blocks
Carquest Premium – Carquest Engine Oil Filler Cap: Twist-Lock, Direct Fit, Provides Tight Seal, 1 Pack, 10066 (Part No.10066)
from
$6.99
Manufactured from high quality components by an OE Supplier. Proper fit and sealing prevents oil loss. Designed to OEM specifications. High quality finish is designed to compliment the engine compartment appearance.
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Melling Select Performance – Melling Select Performance Engine Oil Pump Intermediate Shaft, 12550 (Part No.12550)
from
$34.99
A new Melling oil pump shaft is recommended to complete every new oil pump install. Melling offers a complete line of high quality shafts for domestic and import pump applications. A new oil pump shaft is necessary due to possible metal fatigue, cracking and even twisting damage of the old shaft even when the part appears to be in good condition. Complete every Melling oil pump replacement with a new Melling oil pump shaft.
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Melling – Melling Stock Replacement Type Oil Pump Intermediate Shaft, IS-55G (Part No.IS-55G)
from
$17.79
A new Melling oil pump shaft is recommended to complete every new oil pump install. Melling offers a complete line of high quality shafts for domestic and import pump applications. A new oil pump shaft is necessary due to possible metal fatigue, cracking and even twisting damage of the old shaft even when the part appears to be in good condition. Complete every Melling oil pump replacement with a new Melling oil pump shaft.
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Melling – Melling Stock Replacement Type Oil Pump Intermediate Shaft, IS-77A (Part No.IS-77A)
from
$12.79
A new Melling oil pump shaft is recommended to complete every new oil pump install. Melling offers a complete line of high quality shafts for domestic and import pump applications. A new oil pump shaft is necessary due to possible metal fatigue, cracking and even twisting damage of the old shaft even when the part appears to be in good condition. Complete every Melling oil pump replacement with a new Melling oil pump shaft.
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ARP Auto Racing – ARP Auto Racing For Use With Chevy Big Block, 8740 Steel, 190000 Psi, 135-7901 (Part No.135-7901)
from
$25.99
Many an engine has been destroyed as a result of oil pump driveshaft failure. To cure this all too common problem, ARP has designed an extra heavy duty shaft that will provide you with the necessary reliability. The shaft is made from heat treated, premium grade aerospace chrome moly steel. Moreover, the shaft diameter is a larger diameter than the OEM unit. These features combine to enable ARP shafts to handle the added torque requirements of increased capacity oil pumps or heavy viscosity lubricants.
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Sealed Power – Sealed Power Engine Oil Pump Intermediate Shaft, 224-6154 (Part No.224-6154)
from
$10.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
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Melling – Melling Stock Replacement Type Oil Pump Intermediate Shaft, IS-77 (Part No.IS-77)
from
$23.99
A new Melling oil pump shaft is recommended to complete every new oil pump install. Melling offers a complete line of high quality shafts for domestic and import pump applications. A new oil pump shaft is necessary due to possible metal fatigue, cracking and even twisting damage of the old shaft even when the part appears to be in good condition. Complete every Melling oil pump replacement with a new Melling oil pump shaft.
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Melling – Melling Stock Replacement Type Oil Pump Intermediate Shaft, IS-55E (Part No.IS-55E)
from
$22.99
A new Melling oil pump shaft is recommended to complete every new oil pump install. Melling offers a complete line of high quality shafts for domestic and import pump applications. A new oil pump shaft is necessary due to possible metal fatigue, cracking and even twisting damage of the old shaft even when the part appears to be in good condition. Complete every Melling oil pump replacement with a new Melling oil pump shaft.
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ARP Auto Racing – ARP Auto Racing For Use With All Chevy Small Blocks, 8740 Steel, 190000 Psi, 134-7901 (Part No.134-7901)
from
$24.99
Many an engine has been destroyed as a result of oil pump driveshaft failure. To cure this all too common problem, ARP has designed an extra heavy duty shaft that will provide you with the necessary reliability. The shaft is made from heat treated, premium grade aerospace chrome moly steel. Moreover, the shaft diameter is a larger diameter than the OEM unit. These features combine to enable ARP shafts to handle the added torque requirements of increased capacity oil pumps or heavy viscosity lubricants.
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Melling Select Performance – Melling Select Performance Engine Oil Pump Intermediate Shaft, 12770 (Part No.12770)
from
$32.99
A new Melling oil pump shaft is recommended to complete every new oil pump install. Melling offers a complete line of high quality shafts for domestic and import pump applications. A new oil pump shaft is necessary due to possible metal fatigue, cracking and even twisting damage of the old shaft even when the part appears to be in good condition. Complete every Melling oil pump replacement with a new Melling oil pump shaft.
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Popular 1975 GMC K15 Engine Blocks Categories
Most Popular Oil Cap for 1975 GMC K15s
Enhance your 1975 GMC K15 with this popular Oil Cap we have in stock, for $6.99.
Carquest Premium – Carquest Engine Oil Filler Cap: Twist-Lock, Direct Fit, Provides Tight Seal, 1 Pack, 10066 (Part No.10066)
from
$6.99
Manufactured from high quality components by an OE Supplier. Proper fit and sealing prevents oil loss. Designed to OEM specifications. High quality finish is designed to compliment the engine compartment appearance.
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Best-Selling 1975 GMC K15 Oil Pump Shafts
Upgrade your K15 with one of our 4 best-selling Oil Pump Shafts, earning an average 5 stars rating across 7 reviews.
Melling – Melling Stock Replacement Type Oil Pump Intermediate Shaft, IS-55E (Part No.IS-55E)
from
$22.99
A new Melling oil pump shaft is recommended to complete every new oil pump install. Melling offers a complete line of high quality shafts for domestic and import pump applications. A new oil pump shaft is necessary due to possible metal fatigue, cracking and even twisting damage of the old shaft even when the part appears to be in good condition. Complete every Melling oil pump replacement with a new Melling oil pump shaft.
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Melling – Melling Stock Replacement Type Oil Pump Intermediate Shaft, IS-55G (Part No.IS-55G)
from
$17.79
A new Melling oil pump shaft is recommended to complete every new oil pump install. Melling offers a complete line of high quality shafts for domestic and import pump applications. A new oil pump shaft is necessary due to possible metal fatigue, cracking and even twisting damage of the old shaft even when the part appears to be in good condition. Complete every Melling oil pump replacement with a new Melling oil pump shaft.
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Melling Select Performance – Melling Select Performance Engine Oil Pump Intermediate Shaft, 12550 (Part No.12550)
from
$34.99
A new Melling oil pump shaft is recommended to complete every new oil pump install. Melling offers a complete line of high quality shafts for domestic and import pump applications. A new oil pump shaft is necessary due to possible metal fatigue, cracking and even twisting damage of the old shaft even when the part appears to be in good condition. Complete every Melling oil pump replacement with a new Melling oil pump shaft.
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ARP Auto Racing – ARP Auto Racing For Use With All Chevy Small Blocks, 8740 Steel, 190000 Psi, 134-7901 (Part No.134-7901)
from
$24.99
Many an engine has been destroyed as a result of oil pump driveshaft failure. To cure this all too common problem, ARP has designed an extra heavy duty shaft that will provide you with the necessary reliability. The shaft is made from heat treated, premium grade aerospace chrome moly steel. Moreover, the shaft diameter is a larger diameter than the OEM unit. These features combine to enable ARP shafts to handle the added torque requirements of increased capacity oil pumps or heavy viscosity lubricants.
See More
Top-Rated Engine Block Brands For Your 1975 GMC K15
When it comes to finding the perfect Engine Block for your 1975 GMC K15, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 4 trusted brands. We carry the most popular Engine Block brands including Carquest Premium and Melling, and more, all known for their exceptional customer ratings (average brand rating of 4.5 stars) and competitive prices, as low as $6.99. Purchasing a Engine Block from us here at Advance Auto Parts is a smart move for both you and your 1975 GMC K15, providing peace of mind with parts that meet or exceed OEM standards.
Popular Carquest Premium 1975 GMC K15 Engine Blocks
If you’re looking for a top-quality Engine Block for your 1975 GMC K15, Advance Auto Parts has exactly what you need with our selection of Carquest Premium Engine Blocks. We have 1 Carquest Premium Engine Blocks in stock for this fitment, all known for their durability and precision fit. With prices starting at just $6.99, you’ll find the perfect Engine Block for your needs and budget. Carquest Premium Engine Blocks for the 1975 GMC K15 come highly rated, with over 15 customer reviews and an impressive average rating of 4.5 stars. Choosing a Carquest Premium Engine Block from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
from
$6.99
(15)
Carquest Engine Oil Filler Cap: Twist-Lock, Direct Fit, Provides Tight Seal, 1 Pack, 10066
“Its an oil cap that fit and was cheap.”
Top-Quality Melling 1975 GMC K15 Engine Blocks
For those in search of a high-quality Engine Block for their 1975 GMC K15, Advance Auto Parts offers a great selection of Melling Engine Blocks. With 1 Melling Engine Blocks in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Engine Blocks start at just $22.99, giving you a range of options to suit your budget. Backed by over 7 customer ratings and an average rating of 4.3 stars, Melling Engine Blocks provide both reliability and excellent performance. Choosing a Melling Engine Block from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
from
$22.99
(7)
Melling Stock Replacement Type Oil Pump Intermediate Shaft, IS-55E
“After checking several sources Advance Auto hadthe best value.”
FAQs for 1975 GMC K15 Engine Blocks
What are the best-selling Engine Blocks for 1975 GMC K15s?
Out of 5 Engine Blocks that fit 1975 GMC K15s, the following parts are the top sellers:
- Melling Stock Replacement Type Oil Pump Intermediate Shaft, IS-55E (3681491) – $22.99
- Melling Stock Replacement Type Oil Pump Intermediate Shaft, IS-55G (5687837) – $17.79
- ARP Auto Racing For Use With All Chevy Small Blocks, 8740 Steel, 190000 Psi, 134-7901 (11530101) – $24.99
What’s the price range for 1975 GMC K15 Engine Blocks?
The prices of Engine Blocks for the 1975 GMC K15 range from $6.99 up to $34.99 for the most premium parts.
What is the average price of an Engine Block for a 1975 GMC K15?
The average price for Engine Blocks for the 1975 GMC K15 is $19.84. Keep in mind the variety of part types within our Engine Block category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Engine Blocks for other GMC K15 model years?
What are the cheapest Engine Blocks for my 1975 GMC K15?
The cheapest 1975 GMC K15 Engine Blocks we carry are:
- Carquest Engine Oil Filler Cap: Twist-Lock, Direct Fit, Provides Tight Seal, 1 Pack, 10066 (18481405) – $6.99
- Melling Stock Replacement Type Oil Pump Intermediate Shaft, IS-55G (5687837) – $17.79
- Melling Stock Replacement Type Oil Pump Intermediate Shaft, IS-55E (3681491) – $22.99
- ARP Auto Racing For Use With All Chevy Small Blocks, 8740 Steel, 190000 Psi, 134-7901 (11530101) – $24.99
- Melling Select Performance Engine Oil Pump Intermediate Shaft, 12550 (11965247) – $34.99
Does Advance Auto Parts sell Engine Blocks for any other 1975 GMC models?
Yes. We stock Engine Blocks for 11 other popular 1975 GMC models. Some of the most popular are 1975 Jimmy Engine Blocks, 1975 K25 Engine Blocks, 1975 G25 Engine Blocks, 1975 C25 Engine Blocks, and 1975 C15 Engine Blocks.
What are the top-rated Engine Blocks that fit the 1975 GMC K15?
Based on 96 reviews by customers, our 1975 GMC K15 Engine Blocks have an average customer rating of 5.0 stars. These are the highest-rated categories of Engine Blocks for the 1975 GMC K15 and their top-rated products:
- Oil Caps
- Oil Pump Shafts
- Melling Stock Replacement Type Oil Pump Intermediate Shaft, IS-55E (3681491) – $22.99
What types of Engine Blocks do you sell for my 1975 GMC K15?
As of 8/2/26, these are some of the most in-demand types of Engine Blocks for a 1975 GMC K15:
Can I get help with 1975 GMC K15 Engine Block orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about GMC Engine Blocks and more.
What is your return policy for GMC K15 Engine Blocks?
Advance Auto Parts keeps returns simple. For new GMC K15 Engine Blocks and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.