2003 GMC Sierra Automatic Transmission Oil Coolers & Components

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    • (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 - $257.95
    • (1 review)
      # 448759146
      GMC Sierra Automatic Transmission 2003, Automatic Transmission Oil Cooler Assembly by Replace®. Designed utilizing the latest technology, this product features premium quality and will perform better than advertised. Perfect for your...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $39.86 - $58.70
    • (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
      $105.47 - $345.51
    • (0 reviews)
      # 814237962
      GMC Sierra 2003, Ultra-Cool Transmission Oil Cooler by CompressorWorks®.
      Made with the use of the latest technologiesGuaranteed to provide ultimate strength and durability
      $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)
      $8.67 - $42.95
    • (0 reviews)
      # 1232009319
      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)
      $3.01 - $27.95
    • (0 reviews)
      # mpn4498753025
      GMC Sierra 1500 HD / 2500 / 2500 HD / 3500 4-Speed 4L80-E Transmission 2003, GM Original Equipment™ Automatic Transmission Case Vent Passage Splash Shield by ACDelco®. Designed utilizing the latest technology, this product by ACDelco...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $7.11
    • (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
      $5.34
    • (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
      $33.99
    • (0 reviews)
      # mpn4498752992
      GMC Sierra 1500 HD / 2500 / 2500 HD / 3500 4-Speed 4L80-E Transmission 2003, GM Original Equipment™ Automatic Transmission Fluid Lube Pipe Retainer by ACDelco®. Designed utilizing the latest technology, this product by ACDelco...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $6.27
    • (0 reviews)
      # 1232094297
      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
      $5.99 - $30.38
    • (0 reviews)
      # 1232094253
      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 - $49.25
    • (0 reviews)
      # 448624311
      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
      $4.32 - $6.91
    • (0 reviews)
      # mpn4422713042
      GMC Sierra Automatic Transmission 2003, GM Original Equipment™ Automatic Transmission Oil Cooler Hose O-Ring by ACDelco®. ID: 0.320". 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
      $5.92
    • (0 reviews)
      # 1232009323
      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
      $5.45 - $31.06
    • (0 reviews)
      # 1311453314
      GMC Sierra 2003, Transmission Oil Cooler Fitting Kit by CompressorWorks®. OD: 0.750".
      Made with the use of the latest technologiesGuaranteed to provide ultimate strength and durability
      $9.04 - $9.50
    • (2 reviews)
      # 1210773601
      GMC Sierra 4.3L / 4.8L / 5.3L 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...
      SAE 45 degree fittings for maximum reliabilityElectrostatically powder coated to prevent corrosion
      $38.22 - $47.82
    • (1 review)
      # 606056332
      GMC Sierra 6.0L / 6.6L / 8.1L 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 oil cooling applications that require a...
      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 systemsUnique plate and fin design
      $38.13 - $52.34
    • (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
      $47.22 - $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
      $25.70 - $35.21
    • (0 reviews)
      # mpn470317753
      GMC Sierra 6.6L 2003, Transmission Oil Cooler by PPE®. The best way to increase the longevity of your transmission is to keep it cool. Heat is the transmission’s biggest enemy. PPE has the industry’s leading solution. PPE’s...
      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)
      # 1210773585
      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 1/2"-20 thread. It is compatible...
      Fits most 5/16" trans-lines with 1/2"-20 threadCompatible with OEM cooler systems
      $4.83
    • (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
      $15.55
    • (0 reviews)
      # 1210773604
      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
      $43.33 - $46.46
    • (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)
      # 1210761559
      Transmission Fitting Set by Phenix®. 2 Pieces. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $18.12 - $27.17
    • (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
      $474.53
    • (0 reviews)
      # mpn4495257743
      GMC Sierra 2003, High Performance Transmission Oil Cooler by CompressorWorks®. Size: 7-1/2" x 12-1/2".
      Made with the use of the latest technologiesGuaranteed to provide ultimate strength and durability
      $30.75
    • (0 reviews)
      # 814293750
      GMC Sierra 2003, Rapid-Cool Transmission Oil Cooler by CompressorWorks®.
      Made with the use of the latest technologiesGuaranteed to provide ultimate strength and durability
      $39.10 - $56.28
    • (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)
      # 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
      $51.98
    • (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
      $54.98


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