20 Best 2003 Gmc Sierra Transmission Cooler Lines [2024]

Are you looking for the best 2003 Gmc Sierra Transmission Cooler Lines? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling 2003 Gmc Sierra Transmission Cooler Lines.

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# Preview Product
1 Dorman 624-116 Automatic Transmission Oil Cooler Hose Assembly Compatible with Select Cadillac /... Dorman 624-116 Automatic Transmission Oil Cooler Hose Assembly Compatible with Select Cadillac /...
2 Dorman 800-604 Transmission Line Connector With 3/8 Tube X 1/4-18 In. Thread Compatible with Select... Dorman 800-604 Transmission Line Connector With 3/8 Tube X 1/4-18 In. Thread Compatible with...
3 Dorman 624-117 Automatic Transmission Oil Cooler Hose Assembly Compatible with Select Cadillac /... Dorman 624-117 Automatic Transmission Oil Cooler Hose Assembly Compatible with Select Cadillac /...
4 Dorman 624-153 Automatic Transmission Oil Cooler Hose Assembly Compatible with Select Cadillac /... Dorman 624-153 Automatic Transmission Oil Cooler Hose Assembly Compatible with Select Cadillac /...
5 Dorman 800-605 Transmission Line Connector With 3/8 Tube X 5/8-18 In. Thread Compatible with Select... Dorman 800-605 Transmission Line Connector With 3/8 Tube X 5/8-18 In. Thread Compatible with...
6 Four Seasons 53015 Transmission Oil Cooler Hose, 54-Inch Four Seasons 53015 Transmission Oil Cooler Hose, 54-Inch
7 Hayden Automotive 390 Transmission Line Fitting Kit Hayden Automotive 390 Transmission Line Fitting Kit
8 TYC 19031 External Transmission Oil Cooler Compatible with 2007-2013 Chevrolet Silverado 1500 TYC 19031 External Transmission Oil Cooler Compatible with 2007-2013 Chevrolet Silverado 1500
9 Four Seasons 53001 Ultra-Cool Transmission Oil Cooler Four Seasons 53001 Ultra-Cool Transmission Oil Cooler
10 Dorman 624-124 Automatic Transmission Oil Cooler Hose Assembly Compatible with Select Cadillac /... Dorman 624-124 Automatic Transmission Oil Cooler Hose Assembly Compatible with Select Cadillac /...
11 Four Seasons 53020 Transmission Cooler Installation Fitting Four Seasons 53020 Transmission Cooler Installation Fitting
12 Dorman 800-606 Transmission Line Connector With 3/8 Tube X 3/8-18In. Thread Compatible with Select... Dorman 800-606 Transmission Line Connector With 3/8 Tube X 3/8-18In. Thread Compatible with...
13 Dorman 918-213 Automatic Transmission Oil Cooler Compatible with Select Cadillac / Chevrolet / GMC... Dorman 918-213 Automatic Transmission Oil Cooler Compatible with Select Cadillac / Chevrolet /...
14 Hayden Automotive 678 Rapid-Cool Add-On Transmission Cooler 11.0” x 9.50” x 0.75” with 4’... Hayden Automotive 678 Rapid-Cool Add-On Transmission Cooler 11.0” x 9.50” x 0.75” with 4’...
15 Hayden Automotive 403 Ultra-Cool Tube and Fin Transmission Cooler Hayden Automotive 403 Ultra-Cool Tube and Fin Transmission Cooler
16 Hayden Automotive 679 Rapid-Cool Plate and Fin Transmission Cooler, Black, 11 Inch Hayden Automotive 679 Rapid-Cool Plate and Fin Transmission Cooler, Black, 11 Inch
17 Hayden Automotive 402 Ultra-Cool Tube and Fin Transmission Cooler Hayden Automotive 402 Ultra-Cool Tube and Fin Transmission Cooler
18 Hayden Automotive 677 Rapid-Cool Plate and Fin Transmission Cooler Hayden Automotive 677 Rapid-Cool Plate and Fin Transmission Cooler
19 Hayden Automotive 251 Transmission Cooler Reinstallation Kit Hayden Automotive 251 Transmission Cooler Reinstallation Kit
20 Hayden Automotive 112 Engine Oil Cooler Hose Hayden Automotive 112 Engine Oil Cooler Hose
Bestseller No. 1
Dorman 624-116 Automatic Transmission Oil Cooler Hose Assembly Compatible with Select Cadillac /...
  • Reliable replacement - this automatic transmission oil cooler hose is precision-engineered to replace the stock hose assembly on specific vehicles
  • Quality construction - manufactured from metal and rubber with OE-style fittings to provide a reliable replacement
  • Excellent value - OE quality at a lower price
  • Vehicle tested - has undergone on-vehicle testing to ensure quality, proper fit and performance
  • Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
SaleBestseller No. 2
Dorman 800-604 Transmission Line Connector With 3/8 Tube X 1/4-18 In. Thread Compatible with Select...
  • Quality replacement - this transmission cooler connector matches the fit and function of the original equipment connector
  • Durable construction - this oil cooler line connector is made of quality materials for a precise fit and leak-free durability
  • Performance tested - this connector has been rigorously pressure tested to ensure reliable performance
  • Ideal shop supply - this connector is recommended to have on hand any time service is being performed on the transmission oil cooler line
  • Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
SaleBestseller No. 3
Dorman 624-117 Automatic Transmission Oil Cooler Hose Assembly Compatible with Select Cadillac /...
  • Reliable replacement - this automatic transmission oil cooler hose is precision-engineered to replace the stock hose assembly on specific vehicles
  • Quality construction - manufactured from metal and rubber with OE-style fittings to provide a reliable replacement
  • Excellent value - OE quality at a lower price
  • Vehicle tested - has undergone on-vehicle testing to ensure quality, proper fit and performance
  • Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
Bestseller No. 4
Dorman 624-153 Automatic Transmission Oil Cooler Hose Assembly Compatible with Select Cadillac /...
  • Reliable replacement - this automatic transmission oil cooler hose is precision-engineered to replace the stock hose assembly on specific vehicles
  • Quality construction - manufactured from metal and rubber with OE-style fittings to provide a reliable replacement
  • Excellent value - OE quality at a lower price
  • Vehicle tested - has undergone on-vehicle testing to ensure quality, proper fit and performance
  • Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
SaleBestseller No. 5
Dorman 800-605 Transmission Line Connector With 3/8 Tube X 5/8-18 In. Thread Compatible with Select...
  • Quality replacement - this transmission cooler connector matches the fit and function of the original equipment connector
  • Durable construction - this oil cooler line connector is made of quality materials for a precise fit and leak-free durability
  • Performance tested - this connector has been rigorously pressure tested to ensure reliable performance
  • Ideal shop supply - this connector is recommended to have on hand any time service is being performed on the transmission oil cooler line
  • Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
Bestseller No. 6
Four Seasons 53015 Transmission Oil Cooler Hose, 54-Inch
  • Compatible with 11/32" OEM cooler systems
  • Tube made of black chemigum (nitrile)
  • Reinforced with 2-spiral synthetic
  • Covered in black Hypalon
Bestseller No. 7
Hayden Automotive 390 Transmission Line Fitting Kit
  • Simplifies transmission cooler installation
  • Package Dimensions: 12.953 L x 4.318 H x 9.144 W (centimeters)
  • For auxiliary transmission cooler installation without cutting OE lines
  • Made in China
SaleBestseller No. 8
TYC 19031 External Transmission Oil Cooler Compatible with 2007-2013 Chevrolet Silverado 1500
  • OE-comparable core dimensions to achieve sufficient cooling surface area for best performance
  • OE-comparable mounting provisions ensure drop-in precise fitment
  • Rigorous and accelerated cycling tests to ensure product service quality and durability
Bestseller No. 9
Four Seasons 53001 Ultra-Cool Transmission Oil Cooler
  • Four Seasons 53001 Ultra-Cool Transmission Oil Cooler (53001)
  • Part number: 53001
  • Package Weight: 1.95 pounds
  • Package Dimensions: 4.826 H x 34.798 L x 28.956 W (centimeters)
Bestseller No. 10
Dorman 624-124 Automatic Transmission Oil Cooler Hose Assembly Compatible with Select Cadillac /...
  • Reliable replacement - this automatic transmission oil cooler hose is precision-engineered to replace the stock hose assembly on specific vehicles
  • Quality construction - manufactured from metal and rubber with OE-style fittings to provide a reliable replacement
  • Excellent value - OE quality at a lower price
  • Vehicle tested - has undergone on-vehicle testing to ensure quality, proper fit and performance
  • Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
Bestseller No. 11
Four Seasons 53020 Transmission Cooler Installation Fitting
  • Package Dimensions: 4.064 cms (L) x 9.144 cms (W) x 4.318 cms (H)
  • Product Type: Electromechanical Gauge
  • Package Quantity: 1
  • Country Of Origin: China
  • Fit type: Vehicle Specific
Bestseller No. 12
Dorman 800-606 Transmission Line Connector With 3/8 Tube X 3/8-18In. Thread Compatible with Select...
  • country of origin : United States
  • package dimensions :4.36" L x 1.56" W x 1.03" H
  • Product type :AUTO PART
  • package weight :0.5lbs
Bestseller No. 13
Dorman 918-213 Automatic Transmission Oil Cooler Compatible with Select Cadillac / Chevrolet / GMC...
  • Direct replacement - this transmission oil cooler is a precise match for the fit and function of the original equipment trans cooler
  • Durable construction - this oil cooler is made of durable, corrosion-resistant aluminum for reliable, leak-free performance
  • Cost-effective solution - offers original equipment quality at a competitive price
  • Quality tested - this part has undergone extensive testing to ensure a quality fit and long service life
  • Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
Bestseller No. 14
Hayden Automotive 678 Rapid-Cool Add-On Transmission Cooler 11.0” x 9.50” x 0.75” with 4’...
  • Size Is 3/4 Inch X 11 Inch X 9-1/2 Inch
  • Pick-Up Trucks And Vans, Class "C" Motor Homes , Travel Trailers To 24 Feet
  • Gvwr Up To 24,000 Pounds, Towing Up To 5,000 Pounds
  • Patented Internal Turbulation Increases Heat Transfer With Minimal Pressure Drop
Bestseller No. 15
Hayden Automotive 403 Ultra-Cool Tube and Fin Transmission Cooler
  • Size is 3/4 inch x 7-1/2 inch x 12-1/2 inch
  • Mid-size and full-size cars, pick-ups
  • GVWR up to 18,000 pounds, towing up to 3,500 pounds
  • Ultrasonically soldered for durability
SaleBestseller No. 16
Hayden Automotive 679 Rapid-Cool Plate and Fin Transmission Cooler, Black, 11 Inch
  • Size is 3/4 inch x 11 inch x 11-5/8 inch. Compatible with OEM cooler systems
  • Class "A" motor homes, large travel trailers, 5th wheel trailers
  • GVWR up to 30,000 pounds, towing up to 10,000 pounds
  • Patented internal turbulation increases heat transfer with minimal pressure drop
  • Pre-drilled mounting brackets for easy installation
Bestseller No. 17
Hayden Automotive 402 Ultra-Cool Tube and Fin Transmission Cooler
  • Size is 3/4 inch x 5 inch x 15-7/8 inch
  • Compact and mid-size cars
  • GVWR up to 16,000 pounds, towing up to 2,500 pounds
  • Ultrasonically soldered for durability
  • 100 percentage pressure tested
Bestseller No. 18
Hayden Automotive 677 Rapid-Cool Plate and Fin Transmission Cooler
  • Size is 3/4 inch x 11 inch x 7-1/2 inch
  • Mid-size and full-size cars, pick-ups. Material-Aluminum
  • GVWR up to 20,000 pounds, towing up to 2,500 pounds. Coolant temperatures operate from 210°F to 220°F
  • Patented internal turbulation increases heat transfer with minimal pressure drop
  • Pre-drilled mounting brackets for easy installation
SaleBestseller No. 19
Hayden Automotive 251 Transmission Cooler Reinstallation Kit
  • Contains 4 hose clamps
  • Transmission cooler reinstallation kit
  • Kit contains nylon mounting rods foam pads, locking buttons, hose and fitting
  • Package Weight : 0.9 pounds
Bestseller No. 20
Hayden Automotive 112 Engine Oil Cooler Hose
  • Designed for engine oil applications
  • 12 feet hose length accommodates most applications
  • Package Weight: 1.23 kilograms
  • Package Dimensions: 13.7 L x 30.8 H x 23.4 W (centimeters)

Having trouble finding a great 2003 Gmc Sierra Transmission Cooler Lines?

This problem is well understood by us because we have gone through the entire 2003 Gmc Sierra Transmission Cooler Lines research process ourselves, which is why we have put together a comprehensive list of the best 2003 Gmc Sierra Transmission Cooler Liness available in the market today.

After hours of searching and using all the models on the market, we have found the best 2003 Gmc Sierra Transmission Cooler Lines for 2023. See our ranking below!

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John Harvards provides an 2003 Gmc Sierra Transmission Cooler Lines buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

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  1. Brand Value: Every brand of 2003 Gmc Sierra Transmission Cooler Lines has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an 2003 Gmc Sierra Transmission Cooler Lines?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your 2003 Gmc Sierra Transmission Cooler Lines.
  5. Customer Ratings: Number ratings grade 2003 Gmc Sierra Transmission Cooler Lines objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their 2003 Gmc Sierra Transmission Cooler Lines.
  7. Product Quality: You don’t always get what you pay for with an 2003 Gmc Sierra Transmission Cooler Lines, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an 2003 Gmc Sierra Transmission Cooler Lines is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining 2003 Gmc Sierra Transmission Cooler Lines information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding 2003 Gmc Sierra Transmission Cooler Lines is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

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FAQ:

Q: How many transmission cooler lines does a GM Truck have?

A: The design of the transmission cooler lines on most GM trucks is fairly straight forward. If your truck has setup without a transmission cooler from the factory, you’ll only have 2 lines going to and from the transmission to radiator, the send and return.

Q: Can I install a transmission cooler on my Silverado or Sierra?

A: The Silverado and Sierra have a number of transmission cooler upgrade options. and installing a transmission cooler on your truck is very simple for the average DIY enthusiast in your driveway in only a few hours.

Q: What should the transmission temperature be on a GMC Sierra?

A: Shop now. The ideal transmission temperature for your Sierra or Silverado is typically in the 160 – 180 degree range. It is much easier to keep trans temps lower in older trucks due to their simple transmission cooler line setup.

Q: What is the best transmission cooler for a pickup truck?

A: For a full size pickup truck is it typically best to get a larger cooler that has a large cooling surface with a higher GVWR, and either a stacked plate or plate and fin construction. With all these things in mind, our choices for the best transmission coolers for a Chevy Silverado or GMC Sierra include: