GMC K15 OE Transmission Coolers

Your GMC K15 will be happy to know that the search for the right OE Transmission Coolers you’ve been looking for is over! Advance Auto Parts has 12 different OE Transmission Coolers for your vehicle, ready for shipping or in-store pick up. The best part is, our GMC K15 OE Transmission Coolers start from as little as $39.99.

When it comes to your GMC K15, you want parts and products from only trusted brands. Here at Advance Auto Parts, we work with only top reliable OE Transmission Coolers brands so you can shop with complete confidence. Some of our top OE Transmission Coolers brands are Imperial. We’re sure you will get the right product to keep that K15 running for a long time.

We even have reviews of our OEM and aftermarket OE Transmission Coolers products to help you buy with confidence. Hear from other customers via the 2,410 reviews on parts for your GMC K15.

Shop online, find the best price on the right product, and have it shipped right to your door. If you prefer to shop in person for the right OE Transmission Coolers for your K15, visit one of our local Advance Auto Parts locations and you’ll be back on the road in no time!

Compare 25 GMC OE Transmission Coolers

Imperial – High Performance Transmission Oil Cooler (Part No.240516)

High Performance Transmission Oil Cooler

from

$85.99
Product Features:
  • Imperial high-performance transmission cooler
  • Size: 3/4″ x 10″ x 15-7/8″
  • SAE 45-degree fittings for maximum reliability
  • Electrostatic powder-coated to prevent corrosion
  • SAE 45 degree fittings for maximum reliability
  • Electrostatically powder coated to prevent corrosion
  • All aluminum lightweight construction
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Imperial – Maxi-Kool® XL Transmission Oil Cooler (Part No.243007)

Maxi-Kool® XL Transmission Oil Cooler

from

$73.99
The Imperial Maxi-Cool® XL’s plate and fin design offer excellent cooling efficiency in a compact, space-efficient design.

Product Features:
  • Imperial Maxi-Cool® plate and fin transmission cooler
  • Size: 3/4″ x 11″ x 7-1/2″
  • Mid-size and full-size cars, pickups
  • GVWR up to 20,000 lbs.; towing up to 2,500 lbs.
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Imperial – Plate and Fin Style Trans Cooler 3/4" x 5-7/8" x 11" Light Duty (Part No.243006)

Plate and Fin Style Trans Cooler 3/4" x 5-7/8" x 11" Light Duty

from

$59.99
Product Features:
  • Imperial Rapid-Cool« plate and fin transmission cooler
  • Size: 3/4″ x 11″ x 6″
  • Sub-compact to compact cars
  • GVWR up to 18,000 lbs.
  • Compatible with OEM cooler systems
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Dorman – Transmission Oil Cooler (Part No.918-249)

Transmission Oil Cooler

from

$354.99
This automatic transmission oil cooler is designed to match the function of an original cooler on specified vehicles. It is engineered to help maintain proper engine oil temperature when an original cooler has failed from heat, corrosion, or damage.

Product Features:
  • Direct replacement – this automatic transmission fluid cooler is designed to match the function of an original cooler on specified vehicle
  • Ideal solution – engineered to help maintain proper transmission fluid temperature when an original cooler has failed from heat, corrosion or damage
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
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Dorman – Transmission Fluid Cooler (Part No.918-218)

Transmission Fluid Cooler

from

$148.99
This automatic transmission oil cooler is designed to match the function of an original cooler on specified vehicles. It is engineered to help maintain proper engine oil temperature when an original cooler has failed from heat, corrosion, or damage.

Product Features:
  • Direct replacement – this automatic transmission fluid cooler is designed to match the function of an original cooler on specified vehicle
  • Ideal solution – engineered to help maintain proper transmission fluid temperature when an original cooler has failed from heat, corrosion or damage
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

Imperial – Econo-Kool® Transmission Oil Cooler (Part No.242010)

Econo-Kool® Transmission Oil Cooler

from

$54.99
Product Features:
  • Imperial Econo-Kool« tube and fin transmission cooler
  • Size: 3/4″ x 5″ x 15-7/8″
  • Compact and mid-size cars
  • GVWR up to 16,000 lbs.; towing up to 2,500 lbs.
  • Compatible with OEM cooler systems
  • Ultrasonically soldered for reliability
  • 100% pressure testing to 150 PSI for quality assurance
  • High efficiency turbulators
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Imperial – Econo-Kool® Transmission Oil Cooler (Part No.242009)

Econo-Kool® Transmission Oil Cooler

from

$39.99
Product Features:
  • Imperial Econo-Kool« tube and fin transmission cooler
  • Size: 3/4″ x 5″ x 12-1/2″
  • Sub-compact to compact cars
  • GVWR up to 12,000 lbs.
  • Compatible with OEM cooler systems
  • Ultrasonically soldered for reliability
  • 100% pressure testing to 150 PSI for quality assurance
  • High efficiency turbulators
See More

Imperial – Maxi-Kool® XL Transmission Oil Cooler (Part No.243012)

Maxi-Kool® XL Transmission Oil Cooler

from

$81.99
Product Features:
  • Class “A” motor homes, large travel trailers, 5th-wheel trailers
  • GVWR up to 30,000 lbs.; towing up to 10,000 lbs.
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Dorman – Transmission Oil Cooler (Part No.918-213)

Transmission Oil Cooler

from

$149.99
This automatic transmission oil cooler is designed to match the function of an original cooler on specified vehicles. It is engineered to help maintain proper engine oil temperature when an original cooler has failed from heat, corrosion, or damage.

Product Features:
  • Direct replacement – this automatic transmission fluid cooler is designed to match the function of an original cooler on specified vehicle
  • Ideal solution – engineered to help maintain proper transmission fluid temperature when an original cooler has failed from heat, corrosion or damage
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

Imperial – Econo-Kool® Transmission Oil Cooler (Part No.241018)

Econo-Kool® Transmission Oil Cooler

from

$65.99
Product Features:
  • Imperial Econo-Kool« tube and fin transmission cooler
  • Size: 3/4″ x 10″ x 15-7/8″
  • Class “A” motor homes, large travel trailers, 5th-wheel trailers
  • GVWR up to 26,000 lbs.; towing up to 10,000 lbs.
  • Compatible with OEM cooler systems
  • Ultrasonically soldered for reliability
  • 100% pressure testing to 150 PSI for quality assurance
  • High efficiency turbulators
See More

Imperial – Plate and Fin Style Trans Cooler 3/4" x 9-1/2" x 11" Heavy Duty (Part No.243008)

Plate and Fin Style Trans Cooler 3/4" x 9-1/2" x 11" Heavy Duty

from

$80.99
Product Features:
  • Imperial Rapid-Cool« plate and fin transmission cooler
  • Size: 3/4″ x 11″ x 9-1/2″
  • Pickup trucks and vans, class “C” motor homes, travel trailers to 24′
  • GVWR up to 24,000 lbs.; towing up to 5,000 lbs.
  • 33% more efficient than a comparable tube and fin design
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Imperial – Econo-Kool® Transmission Oil Cooler (Part No.242012)

Econo-Kool® Transmission Oil Cooler

from

$52.99
Product Features:
  • Mid-size and full-size cars, pickups
  • GVWR up to 18,000 lbs.; towing up to 3,500 lbs
  • Compatible with OEM cooler systems
  • Ultrasonically soldered for reliability
  • 100% pressure testing to 150 PSI for quality assurance
  • High efficiency turbulators
See More

Imperial – High Performance Transmission Oil Cooler (Part No.240514)

High Performance Transmission Oil Cooler

from

$81.99
High Performance Transmission Oil Cooler 3/4″ x 7-1/2″ x 15-1/2″. Heavy duty. Black. Imperial High Performance coolers are designed to provide outstanding cooling as well as complement other high-performance accessories.

Product Features:
  • Imperial high-performance transmission cooler
  • Size: 3/4″ x 7-1/2″ x 15-7/8″
  • SAE 45-degree fittings for maximum reliability
  • Electrostatic powder-coated to prevent corrosion
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Imperial – High Performance Transmission Oil Cooler (Part No.240512)

High Performance Transmission Oil Cooler

from

$67.99
Product Features:
  • Imperial high-performance transmission cooler
  • Size: 3/4″ x 7-1/2″ x 12-1/2″
  • SAE 45-degree fittings for maximum reliability
  • Electrostatic powder-coated to prevent corrosion
  • SAE 45 degree fittings for maximum reliability
  • Electrostatically powder coated to prevent corrosion
  • All aluminum lightweight construction
See More

Imperial – Econo-Kool® Transmission Oil Cooler (Part No.242016)

Econo-Kool® Transmission Oil Cooler

from

$65.99
Product Features:
  • Imperial Econo-Kool« tube and fin transmission cooler
  • Size: 3/4″ x 7-1/2″ x 15-7/8″
  • Pickup trucks and vans, class “C” motor homes, travel trailers to 24′
  • GVWR up to 22,000 lbs.; towing up to 5,000 lbs.
  • Compatible with OEM cooler systems
  • Ultrasonically soldered for reliability
  • 100% pressure testing to 150 PSI for quality assurance
  • High efficiency turbulators
See More

Dorman – Transmission Oil Cooler Assembly (Part No.918-293)

Transmission Oil Cooler Assembly

from

$229.99
This automatic transmission oil cooler is designed to match the function of an original cooler on specified vehicles. It is engineered to help maintain proper engine oil temperature when an original cooler has failed from heat, corrosion, or damage.

Product Features:
  • Direct replacement – this automatic transmission fluid cooler is designed to match the function of an original cooler on specified vehicle
  • Ideal solution – engineered to help maintain proper transmission fluid temperature when an original cooler has failed from heat, corrosion or damage
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

Imperial – Transmission Oil Cooler (Part No.241015)

Transmission Oil Cooler

from

$145.99
Oil cooler 1-1/2″ x 12″ x 15-1/8″. Extra heavy-duty. Designed for severe-duty transmission oil cooling applications.

Product Features:
  • Imperial Econo-Kool® tube and fin transmission cooler
  • Size: 1-1/2″ x 12″ x 15 1/8″
  • Severe-duty transmission oil cooling applications
  • Towing with class “A” motor home or towing more than 10,000 lbs.
See More

Dorman – Transmission Oil Cooler Assembly (Part No.918-295)

Transmission Oil Cooler Assembly

from

$231.99
This automatic transmission oil cooler is designed to match the function of an original cooler on specified vehicles. It is engineered to help maintain proper engine oil temperature when an original cooler has failed from heat, corrosion, or damage.

Product Features:
  • Direct replacement – this automatic transmission fluid cooler is designed to match the function of an original cooler on specified vehicle
  • Ideal solution – engineered to help maintain proper transmission fluid temperature when an original cooler has failed from heat, corrosion or damage
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

Dorman – HD Solutions – Oil Cooler Heavy Duty (Part No.918-5601)

Oil Cooler Heavy Duty

from

$367.99
This automatic transmission oil cooler is designed to match the function of an original cooler on specified vehicles. It is engineered to help maintain proper engine oil temperature when an original cooler has failed from heat, corrosion, or damage.

Product Features:
  • Direct replacement – this automatic transmission fluid cooler is designed to match the function of an original cooler on specified vehicle
  • Ideal solution – engineered to help maintain proper transmission fluid temperature when an original cooler has failed from heat, corrosion or damage
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

Dorman – Transmission Oil Cooler Assembly (Part No.918-294)

Transmission Oil Cooler Assembly

from

$247.99
This automatic transmission oil cooler is designed to match the function of an original cooler on specified vehicles. It is engineered to help maintain proper engine oil temperature when an original cooler has failed from heat, corrosion, or damage.

Product Features:
  • Direct replacement – this automatic transmission fluid cooler is designed to match the function of an original cooler on specified vehicle
  • Ideal solution – engineered to help maintain proper transmission fluid temperature when an original cooler has failed from heat, corrosion or damage
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

Genera – AT Oil Cooler (Part No.J2040576958TYC)

AT Oil Cooler

from

$147.12
Many trucks and cars come equipped with Transmission Oil Coolers to maintain consistent operating temperatures for the transmission system. External Transmission Oil Coolers offer additional cooling capacity and efficiency for specific cars and trucks that have them. In addition to the Transmission Oil Coolers that are embedded into many TYC Radiators, TYC is excited to also offer externally mounted Transmission Oil Coolers.

Product Features:
  • OE-comparable harness (no
  • OE-comparable mounting provisions ensure drop-in precise fitment
  • Rigorous and accelerated cycling tests to ensure product service quality and durability
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TYC – AT Oil Cooler (Part No.J2040585345TYC)

AT Oil Cooler

from

$171.47
Many trucks and cars come equipped with Transmission Oil Coolers to maintain consistent operating temperatures for the transmission system. External Transmission Oil Coolers offer additional cooling capacity and efficiency for specific cars and trucks that have them. In addition to the Transmission Oil Coolers that are embedded into many TYC Radiators, TYC is excited to also offer externally mounted Transmission Oil Coolers.

Product Features:
  • OE-comparable harness (no
  • OE-comparable mounting provisions ensure drop-in precise fitment
  • Rigorous and accelerated cycling tests to ensure product service quality and durability
See More

Dorman – Transmission Oil Cooler (Part No.918-278)

Transmission Oil Cooler

from

$239.99
This automatic transmission oil cooler is designed to match the function of an original cooler on specified vehicles. It is engineered to help maintain proper engine oil temperature when an original cooler has failed from heat, corrosion, or damage.

Product Features:
  • Direct replacement – this automatic transmission fluid cooler is designed to match the function of an original cooler on specified vehicle
  • Ideal solution – engineered to help maintain proper transmission fluid temperature when an original cooler has failed from heat, corrosion or damage
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

Dorman – AT Oil Cooler (Part No.J2040585323DOR)

AT Oil Cooler

from

$206.23
Dorman’s Auto Trans Oil Cooler is quality-engineered to cool automatic transmission fluid, prolonging its life. The Auto Trans Oil Cooler consequently helps prevent transmission fluid leaks and overheating, protecting the transmission from possible costly damage. Recommended for replacement when replacing the transmission.

Product Features:
  • Coated for high corrosion resistance and increased protection against the elements
  • Durable aluminum construction for long-lasting performance
  • Direct replacement for a proper fit every time
  • Rigorous quality control measures have been undertaken to ensure that this part conforms to product standards (Video)
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Dorman – Transmission Fluid Cooler (Part No.918-290)

Transmission Fluid Cooler

from

$172.99
The original automatic transmission oil cooler on certain Chevrolet and GMC vehicles fails due to a small wire fin design. This Dorman OE FIX replacement features a stacked fin design for added durability and corrosion resistance.

Product Features:
  • Transmission Fluid Cooler
  • Transmission Fluid Cooler
  • The original automatic transmission oil cooler on certain Chevrolet and GMC vehicles fails due to a small wire fin design. This Dorman OE FIX replacement features a stacked fin design for added durability and corrosion resistance.
  • Upgraded replacement – this transmission fluid cooler features an improved fin design for longer service life
  • Corrosion resistant – painted aluminum resists rust for extended durability
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FAQs for GMC K15 OE Transmission Coolers

What are the most popular OE Transmission Coolers for the GMC K15?

With 1 brands you can trust, our most popular OE Transmission Coolers for the GMC K15 are:
High Performance Transmission Oil Cooler
from $81.99
(48)
High Performance Transmission Oil Cooler
OE Transmission Coolers
Econo-Kool® Transmission Oil Cooler
from $54.99
(30)
Econo-Kool® Transmission Oil Cooler
OE Transmission Coolers
Econo-Kool® Transmission Oil Cooler
from $39.99
(10)
Econo-Kool® Transmission Oil Cooler
OE Transmission Coolers

What are the best aftermarket OE Transmission Coolers for the GMC K15?

See what past customers had to say about our highest-rated OE Transmission Coolers for the GMC K15:
Econo-Kool® Transmission Oil Cooler
from $65.99
(11)
Econo-Kool® Transmission Oil Cooler
“In the instructions, a fitting kit #252 was required for my particular truck. It was wrong…#395 was the correct kit. Folks at Imperial advised me of”
Econo-Kool® Transmission Oil Cooler
from $52.99
(4)
Econo-Kool® Transmission Oil Cooler
“I just like the additional cooling on all my vehicles for transmission to last longer. They aren’t getting any cheaper to overhaul!”