2003 GMC Sierra Automatic Transmission Oil Coolers & Components

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    • (0 reviews)
      # 334817728
      GMC Sierra 2003, GM Original Equipment™ Automatic Transmission Oil Cooler by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $107.47 - $352.05
    • (1 review)
      # 448759146
      GMC Sierra Automatic Transmission 2003, Automatic Transmission Oil Cooler Assembly by Replace®. Modern automatic transmissions operate at extremely high fluid temperatures. If an additional cooler is plumbed into the system by the...
      Same quality as OE for less moneyDesigned with the latest software and manufactured with modern tooling
      $39.21 - $60.76
    • (0 reviews)
      # 448553148
      GMC Sierra Automatic Transmission 2003, Automatic Transmission Oil Cooler by Dorman®. Includes: Transmission Cooler. Finish: Black. Dorman’s Auto Trans Oil Cooler is quality-engineered to cool automatic transmission fluid, prolonging...
      Coated for high corrosion resistance and increased protection against the elementsDurable aluminum construction for long-lasting performance
      $110.95 - $204.95
    • (0 reviews)
      # 448601593
      GMC Sierra Automatic Transmission 2003, Rapid-Cool Automatic Transmission Oil Cooler by Four Seasons®. Without Bypass. All products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of car...
      Compatible with OEM cooler systems100% pressure testing to 150 PSI for quality assurance
      $38.07 - $55.43
    • (1 review)
      # 448711114
      GMC Sierra Automatic Transmission 2003, Ultra-Cool Automatic Transmission Oil Cooler by Four Seasons®. All products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of car parts experience,...
      Compatible with OEM cooler systemsUltrasonically soldered for reliability
      $26.69 - $76.83
    • (0 reviews)
      # 814293750
      GMC Sierra 2003, Rapid-Cool Transmission Oil Cooler by CompressorWorks®. CompressorWorks products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile A/C experience, fix it once and...
      Compatible with OEM cooler systems100% pressure testing to 150 PSI for quality assurance
      $39.10 - $56.28
    • (0 reviews)
      # 814224497
      GMC Sierra 2003, Transmission Oil Cooler Fitting Kit by CompressorWorks®. CompressorWorks products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile A/C experience, fix it once and...
      Crafted from high-quality material that makes it durable and longer-lastingA high quality, direct fit OE replacement
      $9.04 - $9.50
    • (0 reviews)
      # 814237962
      GMC Sierra 2003, Ultra-Cool Transmission Oil Cooler by CompressorWorks®. CompressorWorks products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile A/C experience, fix it once and...
      Compatible with OEM cooler systemsUltrasonically soldered for reliability
      $27.16 - $82.44
    • (0 reviews)
      # 16465541
      GMC Sierra 2003, Automatic Transmission Oil Cooler Hose Assembly by Dorman®. Finish: Natural. Replacing a damaged cooler line with Dorman’s Auto Trans Oil Cooler Hose Assembly takes you a long way in protecting your transmission....
      Includes all hardware needed for a complete repair (where applicable)Materials used in construction have been upgraded from steel and/or rubber to corrosion-resistant aluminum (where applicable)
      $10.18 - $27.95
    • (0 reviews)
      # 16724621
      GMC Sierra 2003, Automatic Transmission Oil Cooler Line Connector by Dorman®. Quantity: 1 Piece. Dorman’s Auto Trans Oil Cooler Line Connectors are constructed from high-quality materials to provide a leak-free connection between...
      Direct replacement for a proper fit (where applicable)Retaining clips included (where applicable)
      $3.80 - $27.95
    • (0 reviews)
      # mpn4498753025
      GMC Sierra 1500 HD / 2500 / 2500 HD / 3500 4-Speed 2003, GM Original Equipment™ Automatic Transmission Case Vent Passage Splash Shield by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $7.20
    • (0 reviews)
      # mpn4498752622
      GMC Sierra 1500 HD / 2500 / 2500 HD / 3500 4-Speed 2003, GM Original Equipment™ Automatic Transmission Fluid Cooler Line by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $5.38
    • (0 reviews)
      # mpn864685779
      GMC Sierra 1500 HD / 2500 / 2500 HD / 3500 4-Speed 2003, GM Original Equipment™ Automatic Transmission Fluid Filler Tube by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $33.70
    • (0 reviews)
      # mpn4498752992
      GMC Sierra 1500 HD / 2500 / 2500 HD / 3500 4-Speed 2003, GM Original Equipment™ Automatic Transmission Fluid Lube Pipe Retainer by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $6.34
    • (0 reviews)
      # 71058110
      GMC Sierra 2003, GM Original Equipment™ Automatic Transmission Oil Cooler End Fitting by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised....
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $5.71 - $28.77
    • (0 reviews)
      # 71058129
      GMC Sierra 2003, GM Original Equipment™ Automatic Transmission Oil Cooler Hose by ACDelco®. Material: Rubber/Steel. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $12.88 - $48.85
    • (0 reviews)
      # 448760328
      GMC Sierra Automatic Transmission 2003, GM Original Equipment™ Automatic Transmission Oil Cooler Hose Clip by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $4.12 - $5.69
    • (0 reviews)
      # mpn4422713042
      GMC Sierra Automatic Transmission 2003, GM Original Equipment™ Automatic Transmission Oil Cooler Hose O-Ring by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $5.93
    • (0 reviews)
      # 71851922
      GMC Sierra 2003, GM Original Equipment™ Automatic Transmission Oil Cooler Line Connector by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised....
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $6.64 - $30.15
    • (0 reviews)
      # mpn4492482172
      GMC Sierra 1500 4L60-E Transmission 2003, GM Original Equipment™ Transmission Case Vent Hose Retainer Bracket by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $6.81
    • (0 reviews)
      # mpn925767481
      GMC Sierra 4.3L / 4.8L / 5.3L / 6.0L / 8.1L Automatic Transmission 2003, Automatic Transmission Oil Cooler Hose by Four Seasons®. All products are engineered and tested to provide years of trouble free operation. Backed by over 50 years...
      Compatible with 11/32" OEM cooler systemsTube made of black chemigum (nitrile)
      $7.10
    • (1 review)
      # 231955926
      GMC Sierra Automatic Transmission 2003, Automatic Transmission Oil Cooler Mounting Kit by Four Seasons®. All products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of car parts experience,...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $4.59 - $12.47
    • (0 reviews)
      # mpn947146994
      GMC Sierra 4.3L / 4.8L / 5.3L / 6.0L / 8.1L Automatic Transmission with 1/2"-20 Thread 5/16" Transmission Lines 2003, Transmission Oil Cooler Coupling by Four Seasons®. With Quick Connect Coupler. All products are engineered and tested...
      Quik-Connectr Coupler - Fits Most 5/16" Trans-Lines with 1/2"-20 ThreadCompatible with OEM cooler systems
      $4.54
    • (1 review)
      # 1000110906
      GMC Sierra Automatic Transmission 2003, Transmission Oil Cooler Installation Kit by Four Seasons®. Products are engineered and tested to provide years of trouble free operation. Backed by over 50 years experience, fix it once and fix it...
      Crafted from high-quality material that makes it durable and longer-lastingA high quality, direct fit OE replacement
      $8.85 - $9.40
    • (0 reviews)
      # 1000216062
      GMC Sierra Automatic Transmission 2003, Transmission Oil Cooler Fitting Kit by Hayden®. This product is used to easily connect the transmission cooler line to the cooler hose. Manufactured from quality materials to ensure reliable,...
      Designed to connect the transmission cooler line to the cooler hoseDirect replacement for proper fit
      $7.15 - $7.84
    • (0 reviews)
      # mpn2937056
      GMC Sierra 4.3L / 4.8L / 5.3L / 6.0L / 8.1L Automatic Transmission 2003, Transmission Oil Cooler Hose by Hayden®. Covered in Black Hypalon. This part provides a safe heat and oil resistant connecting line between your oil cooler and...
      Direct replacement for proper fitMade of black chemigum (nitrile)
      $7.84
    • (0 reviews)
      # 1000071907
      GMC Sierra Automatic Transmission 2003, Transmission Oil Cooler Mounting Kit by Hayden®. With this product, you can easily install both your transmission oil cooler and electric fan. Kit includes mounting brackets, tube clamps and bolts
      For Installation Of Transmission Coolers And Electric FansProvides quick, effective installation of Hayden products
      $4.21 - $13.10
    • (2 reviews)
      # 606106470
      GMC Sierra 1500 2003, High Performance Transmission Oil Cooler Kit by Hayden®. Featuring a lightweight aluminum construction, this high performance transmission oil cooler is designed to provide outstanding cooling, as well as...
      SAE 45 degree fittings for maximum reliabilityElectrostatically powder coated to prevent corrosion
      $41.28 - $50.67
    • (1 review)
      # 606063541
      GMC Sierra 1500 HD / 2500 / 2500 HD / 3500 2003, Rapid-Cool™ Heavy Duty Transmission Oil Cooler by Hayden®. Fittings: 7/8"-14 Female x 37 Degrees JIC Male Flare -12. This product is perfect for transmission and engine oil cooling...
      Plate and fin designPatented internal turbulation for increased heat transfer and minimal pressure drop
      $77.60 - $113.58
    • (0 reviews)
      # 606095312
      GMC Sierra 2003, Rapid-Cool™ Transmission Oil Cooler Kit by Hayden®. This premium transmission oil cooler features a unique plate and fin design, which is 33% more efficient than a comparable tube and fin design. Thanks to its...
      Compatible with OEM cooler systems100% pressure testing to 150 PSI for quality assurance
      $38.12 - $52.23
    • (0 reviews)
      # 228633530
      GMC Sierra 2003, Rapid-Cool™ Transmission Oil Cooler with Thermal Bypass by Hayden®. This premium transmission oil cooler features a unique plate and fin design, which is 33% more efficient than a comparable tube and fin design....
      Compatible with OEM cooler systemsUnique plate and fin design
      $51.73 - $69.37
    • (0 reviews)
      # 605981380
      GMC Sierra 2003, Ultra-Cool™ Transmission Oil Cooler Kit by Hayden®. This product is an effective and economical way to keep your transmission at its optimum operating temperature. The high-efficiency turbulators in every tube direct...
      Compatible with OEM cooler systemsUltrasonically soldered for reliability
      $29.52 - $38.12
    • (0 reviews)
      # mpn1523561631
      GMC Sierra 2003, TransLife™ Direct Fit Transmission Oil Cooler Kit by Flex-a-Lite®. Includes: With Guard. GVW: 18000 lbs. Thread: -6AN Fittings. Cooler Style: J-Return. Translife® Transmission Oil Cooler Kits provide additional...
      7 1/2 x15 inches½ inch tube diameter
      $124.53
    • (0 reviews)
      # mpn358727638
      GMC Sierra 1500 / 2500 HD 2003, Thin Line Transmission Oil Cooler by Perma-Cool®. Perma-Cool Thin Line transmission coolers feature 1/2" aluminum tubes, Turbulator™ heat sink insert cooling fins, and plastic fin protectors. Thin Line...
      High quality at an affordable priceExpertly made from premium materials
      $50.98
    • (0 reviews)
      # mpn470317753
      GMC Sierra 6.6L 2003, Transmission Oil Cooler by PPE®. Includes: With Orange Retaining Clip Connectors. The best way to increase the longevity of your transmission is to keep it cool. Heat is the transmission’s biggest enemy. PPE has...
      Thoughtfully designed to match your diesel engine needsMade to help enhance the performance of your vehicle
      $359.99
    • (0 reviews)
      # mpn470565152
      GMC Sierra 6.6L 2003, High Performance Transmission Cooler Repair Lines by Deviant Race Parts®. GM's factory transmission lines leave something to be desired. DRP saw a need to build a high quality, LIFETIME WARRANTED, part that...
      5/8" 1500 psi rated Industrial Strength Hydraulic LinesAll necessary fittings and adapters to bolt up to factory locations
      $270.00
    • (0 reviews)
      # mpn469957124
      GMC Sierra 2500 HD 6.6L 2003, Transmission Cooler Line Repair Kit by Merchant Automotive®. A permanent solution to a growing problem. As these trucks are getting a few years older, the transmission cooler lines can start to develop...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $189.05
    • (0 reviews)
      # mpn2929635
      GMC Sierra 2003, Transmission Oil Cooler Coupling by Hayden®. Replace your defective oil cooler coupling with this part. Manufactured from premium brass, the part fits most 5/16" transmission lines with ½"-20 thread. It is compatible...
      Fits most 5/16" trans-lines with 1/2"-20 threadCompatible with OEM cooler systems
      $6.69
    • (0 reviews)
      # mpn670672843
      GMC Sierra 6.6L 2003, Transmission Cooler Lines by Fleece Performance®. To keep your engine cool and improve your vehicle's performance, this product is just the right solution. Manufactured from high-quality materials, it will surely...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $291.53
    • (0 reviews)
      # mpn487292025
      GMC Sierra 4-Speed 4L80-E Transmission 2003, Transmission Fittings by Russell®. Thread: -6 to 1/4" 4L80. Transmission fittings are designed to replace OEM adapters in TH350, TH400, 700R4 and other applications that utilize 1/4" NPSM...
      High quality at an affordable priceExpertly made from premium materials
      $18.95
    • (0 reviews)
      # 605963877
      GMC Sierra 4-Speed 4L80-E Transmission 2003, Transmission Cooler Line Adapter Fitting by TCI®. Designed utilizing the latest technology, this product by TCI features premium quality and will perform better than advertised. Perfect for...
      High quality at an affordable priceExpertly made from premium materials
      $44.38 - $44.85
    • (0 reviews)
      # mpn470565150
      GMC Sierra 6.6L 2003, Transmission Cooler Repair Lines by Deviant Race Parts®. GM's factory transmission lines leave something to be desired. DRP saw a need to build a high quality, LIFETIME WARRANTED, part that completely replace the...
      All necessary fittings and adapters to bolt up to factory locationsFull, step by step, instructions
      $220.00
    • (0 reviews)
      # 734268406
      GMC Sierra 4L80-E Transmission 4-Speed 2003, -6 AN to 1/4" NPS Transmission Fitting Set by Phenix®. Material: Aluminum. 2 Pieces. Dash Size: -6 AN. This product is made of high-quality materials to serve you for years to come. Designed...
      Manufactured in quality certified facilitiesTested to offer the ultimate in safety
      $19.64
    • (0 reviews)
      # mpn469957751
      GMC Sierra 2500 HD 6.6L Automatic Transmission 2003, Transmission Oil Cooler by Merchant Automotive®. Designed utilizing the latest technology, this product by Merchant Automotive features premium quality and will perform better than...
      High quality at an affordable priceExpertly made from premium materials
      $457.58
    • (0 reviews)
      # mpn4495257743
      GMC Sierra 2003, High Performance Transmission Oil Cooler by CompressorWorks®. Size: 7-1/2" x 12-1/2". CompressorWorks products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile A/C...
      SAE 45 degree fittings for maximum reliabilityElectrostatically powder coated to prevent corrosion
      $30.75
    • (0 reviews)
      # mpn4241824841
      GMC Sierra 6.6L Automatic Transmission 2003, Transmission Cooler Line Repair Kit by Merchant Automotive®. With Cutter. A permanent solution to a growing problem. As these trucks are getting a few years older, the transmission cooler...
      High quality at an affordable priceExpertly made from premium materials
      $197.00
    • (0 reviews)
      # mpn358727629
      GMC Sierra 1500 2003, Thin Line Transmission Oil Cooler System by Perma-Cool®. Perma-Cool Thin Line transmission coolers feature 1/2" aluminum tubes,Turbulator™ heat sink insert cooling fins,and plastic fin protectors. Thin Line...
      High quality at an affordable priceExpertly made from premium materials
      $53.98


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