2003 GMC Sierra Fuel Systems

    • Fitch® Fuel Catalyst - OEM In-Line Fuel Catalyst
      GMC Sierra 2003, OEM In-Line Fuel Catalyst by Fitch® Fuel Catalyst. Get improved performance and reduced emissions with the Fitch Fuel Catalyst! Unlike expensive additives that must be continually replenished, you purchase this product once, for...
      Our price: $215.55 - $361.85$215.55
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    • DeatschWerks® - Fuel Injector Set
      GMC Sierra Gas 4.8L / 5.3L / 6.0L 2003, Fuel Injector Set by DeatschWerks®, Includes 8 Injectors. Every set of fuel injectors is flow-matched and balanced for reliable and efficient performance. To ensure you get nothing less than the highest...
      Our price: $410.97 - $462.47$410.97
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    • Snow Performance® - Stage 2 Diesel Boost Cooler
      GMC Sierra Diesel 2003, Stage 2 Diesel Boost Cooler by Snow Performance®. Kit includes: UHO (Ultra High Ouput) Pump, 3 Quart Reservoir, Bulkhead Fitting, Digital Variable Controller, 2 Nozzles To Cover a Wide Range of Horsepower, All Required...
      Our price: $605.16$605.16
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    • Snow Performance® - Diesel TOW-MAX
      GMC Sierra 6.6L 2003, Diesel TOW-MAX by Snow Performance®. New from Snow Performance, TOW-MAX™ is proven to drastically decrease EGT's – empty or while towing. Special mapping and sophisticated 2d digital controller available result in...
      Our price: $879.67$879.67
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    • Snow Performance® - Diesel MPG MAX
      GMC Sierra 2500 HD Diesel 2003, Diesel MPG MAX by Snow Performance®. New from Snow Performance is the only system proven to increase fuel economy in all load states – empty or while towing. Special mapping and the most sophisticated 2d digital...
      Our price: $578.68 - $1,028.97$578.68
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    • Titan® - Extra-Large Midship Fuel Tank
      GMC Sierra Diesel 2003, Extra-Large Midship Fuel Tank by Titan®. Similar in appearance to the OE unit, this ultra-durable fuel tank is designed to provide extra fuel capacity and double the range of your vehicle. The package includes a steel...
      Our price: $1,233.10 - $1,423.10$1,233.10
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    • aFe® - Silver Bullet Throttle Body Spacer
      GMC Sierra 4.8L / 5.3L 2003, Silver Bullet Throttle Body Spacer by aFe®. What is inexpensive, takes only a few minutes to install, and results in more power and improved throttle response? The aFe Silver Bullet! The Silver Bullet Throttle Body...
      Our price: $123.55$123.55
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    • AIRAID® - PowerAid™ Throttle Body Spacer
      GMC Sierra 2003, PowerAid™ Throttle Body Spacer by AIRAID®. The patented Helix Bore in the PowerAid™ Throttle Body Spacer causes a spinning action of the incoming air charge as it passes through the throttle body. This turbulent airflow...
      Our price: $109.90 - $134.90$109.90
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    • AIRAID® - PowerAid™ Throttle Body Spacer
      Universal PowerAid™ Throttle Body Spacer by AIRAID®. Holley 4150-4160. Edelbrock Square Flange. The patented Helix Bore in the PowerAid™ Throttle Body Spacer causes a spinning action of the incoming air charge as it passes through the...
      Our price: $114.90$114.90
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    • AIRAID® - PowerAid™ Throttle Body Spacer
      Universal PowerAid™ Throttle Body Spacer with Basic Hand Tools by AIRAID®. Holley 2300 Series. Motorcraft OE. The patented Helix Bore in the PowerAid™ Throttle Body Spacer causes a spinning action of the incoming air charge as it passes...
      Our price: $114.90$114.90
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    • AIRAID® - PowerAid™ Throttle Body Spacer
      Universal PowerAid™ Throttle Body Spacer with Basic Hand Tools by AIRAID®. Holley Spread Bore. Edelbrock Quadrajet. OE Spread Bore. The patented Helix Bore in the PowerAid™ Throttle Body Spacer causes a spinning action of the incoming air...
      Our price: $114.90$114.90
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    • AIRAID® - EconoAid™ Throttle Body Spacer
      GMC Sierra 2003, EconoAid™ Throttle Body Spacer by AIRAID®. The blades in the patented EconoAid™ Throttle Body Booster cause a spinning action of the incoming air charge as it passes through the throttle body. This turbulent airflow greatly...
      Our price: $29.99$29.99
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    • BBK® - Power-Plus Series™ Twin Throttle Body
      GMC Sierra 4.8L / 5.3L / 6.0L 2003, Power-Plus Series™ Twin Throttle Body 80mm Diameter by BBK Performance®. Increase airflow and add 15-20 horsepower at the rear wheels by bolting on this high-flow throttle body. It’s a direct replacement...
      Our price: $381.09$381.09
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    • VOLANT® - Vortice Throttle Body Spacer
      GMC Sierra 4.8L / 5.3L / 6.0L 2003, Vortice Throttle Body Spacer by Volant®. Make your intake air charge swirl its way into your cylinders. The cast fins on the Vortice spacer will induce a vortex as the air travels from the throttle body to the...
      Our price: $47.31$47.31
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    • Taylor Cable® - Throttle Body Spacer
      GMC Sierra 2003, Throttle Body Spacer by Taylor Cable®. Helix Power Throttle Body Spacers increase airflow to improve cylinder filling, while the variable venturi aperture shape enhances turbulence for a more complete fuel burn. Computer designed...
      Our price: $83.07 - $105.21$83.07
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    • K&N® - Inline Fuel Filter
      Inline Fuel Filter by K&N®. Make sure only clean gas flows to your engine with this Inline Fuel Filter.
      Our price: $8.45 - $78.90$8.45
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    • Accel® - Fuel Pressure Regulator
      GMC Sierra T Engine LM7 Engine 2003, Fuel Pressure Regulator by Accel®. Premium quality pressure regulators provide stable fuel pressure under the most demanding conditions. Adjustable fuel pressure regulators allow adjustments for increased fuel...
      Our price: $123.96$123.96
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    • COMP Cams® - Push Rod
      GMC Sierra 4.3L 2003, Push Rod by COMP Cams®. Magnum Pushrods.
      Our price: $7.48 - $133.12$7.48
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    • JET® - Throttle Body Spacer
      GMC Sierra 2003, Throttle Body Spacer by JET®. Jet Powr-Flo; TBI Spacer.
      Our price: $100.49$100.49
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    • Motorcraft® - Fuel Filter
      GMC Sierra 2003, Fuel Filter by Motorcraft®. Keep fuel clean with this premium product from Motorcraft. Manufactured from a 300-series stainless steel, this fuel filter traps and holds the smallest dirt particles, which can lead to poor...
      Our price: $3.89 - $19.36$3.89
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    • Spectre Performance® - Power Plate Throttle Body Spacer
      GMC Sierra 2003, Power Plate Throttle Body Spacer by Spectre Performance®. Rooted in racing, Spectre Performance designs and builds every product with the same goal in mind - the best performance in the market proven on the racetrack! All...
      Our price: $49.99$49.99
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