2003 GMC Sierra Fuel Systems

    • Titan®Extra-Large Midship Fuel Tank
      $1,541.38from $1,233.10
      (0)
      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...
      Designed exclusively for diesel applicationsDoesn’t alter the stock fuel delivery system
      # 15798151
    • DeatschWerks®Fuel Injector Set
      $498.75from $399.00
      (0)
      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...
      Improves fuel flow and performanceDesigned for off-road use only
      # 24841554
    • Accel®Fuel Pressure Regulator
      $150.44$120.35
      (0)
      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...
      The finest quality at a great priceImproves your engine's performance
      # 12670516
    • AIRAID®PowerAid™ Throttle Body Spacer
      $137.38from $109.90
      (0)
      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...
      # 434695
    • AIRAID®PowerAid™ Throttle Body Spacer
      $143.63$114.90
      (0)
      Universal PowerAid™ Throttle Body Spacer by AIRAID®. Holley 4150-4160. Edelbrock Square Flange. OE Square Flange. The patented Helix Bore in the PowerAid™ Throttle Body Spacer causes a spinning action of the incoming air...
      # 2107523
    • AIRAID®PowerAid™ Throttle Body Spacer
      $143.63$114.90
      (0)
      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...
      # 2107524
    • AIRAID®PowerAid™ Throttle Body Spacer
      $143.63$114.90
      (0)
      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...
      # 2107525
    • AIRAID®EconoAid™ Throttle Body Spacer
      $37.49$29.99
      (0)
      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...
      Enhances fuel atomization, which improves combustion and engine efficiencyIncreases low end torque and fuel economy
      # 4306257
    • Spectre Performance®Power Plate Throttle Body Spacer
      $74.99$59.99
      (0)
      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...
      High-tech engine parts for the most power and best performanceThe finest exterior and interior parts for superior appearance and functionality
      # 12068521
    • Taylor Cable®Throttle Body Spacer
      $84.69from $67.75
      (0)
      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....
      # 9409095
    • aFe®Silver Bullet Throttle Body Spacer
      $149.94$119.95
      (0)
      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...
      # 924879
    • BBK®Power-Plus Series™ Twin Throttle Body
      $462.49$369.99
      (0)
      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...
      Designed to increase airflow and improve horsepower15-20 dyno proven horsepower increase at the rear wheels depending on vehicle and application
      # 10961744
    • VOLANT®Vortice Throttle Body Spacer
      $42.88$34.30
      (0)
      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...
      # 2116365
    • Fitch® Fuel CatalystOEM In-Line Fuel Catalyst
      $269.44from $215.55
      (0)
      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...
      # 3763315
    • Snow Performance®Stage 2 Diesel Boost Cooler
      $766.88$613.50
      (0)
      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,...
      Provides extra 50-100 HPIncreases fuel economy up to 10-15%
      # 12842551
    • Snow Performance®Diesel TOW-MAX
      $1,114.76$891.81
      (0)
      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...
      Provides extra 50-100 HPIncreases fuel economy up to 10-15%
      # 12842560
    • Snow Performance®Diesel MPG MAX
      $733.34from $586.67
      (0)
      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...
      Provides extra 50-100 HPIncreases fuel economy up to 10-15%
      # 12883016
    • K&N®Inline Fuel Filter
      $10.15from $8.12
      (0)
      Inline Fuel Filter by K&N®. Make sure only clean gas flows to your engine with this Inline Fuel Filter.
      # 308691
    • K&N®Fuel Filter
      $12.30$9.84
      (0)
      GMC Sierra 4.3L / 4.8L / 5.3L / 6.0L / 8.1L 2003, Fuel Filter by K&N®.
      # 41984303
    • COMP Cams®Push Rod
      $9.08from $7.26
      (0)
      GMC Sierra 4.3L 2003, Push Rod by COMP Cams®. Magnum Pushrods.
      # 14319590
    • JET®Power-Flo™ Throttle Body Spacer
      $125.61$100.49
      (0)
      GMC Sierra 2003, Power-Flo™ Throttle Body Spacer by JET®. Increased Mid-Range Horsepower And Torque. Improved Throttle Response, Increased Fuel Economy. No Other Vehicle Modifications Required. Free Flow Exhaust Systems....
      # 13555032
    • JET®Power-Flo™ Throttle Body Assembly
      $412.45$329.96
      (0)
      GMC Sierra 4.8L / 5.3L / 6.0L 2003, Power-Flo™ Throttle Body Assembly by JET®. Increased Air Flow And Improved Throttle Response. More Horsepower. Direct Bolt On. Updated Electronics. Quick Plug In Play Installation.
      # 41033869
    • Motorcraft®Fuel Filter
      $4.73from $3.78
      (0)
      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...
      Direct OEM replacement for proper fitMeets strict Ford Motor Company standards
      # 23886637
    Guides & Articles
    A Fuel tank sending unit is a term for the mechanical assembly inside your fuel tank which measures the level of liquid in the tank, then reports its findings to the fuel gauge on your instrument cluster. All sending units contain a "float" piece which does just what it describes - floats atop the surface of the fuel. Many automakers design the float piece as an...
    Fuel injectors spray fuel directly into your engine’s cylinders during the intake stroke when a piston moves down to allow air and fuel to fill the cylinder chamber. When injectors are malfunctioning, leaking, or have failed completely, they will cause rough engine performance, poor idle, reduced power and economy, and exhaust that’s rich enough in unburned...
    The throttle controller will basically bypass the computer in the vehicle. It is designed to take the information right from the accelerator position sensor and compile it in a high speed controller circuit that compiles the signal sent from the Accelerator position sensors. With this controller you are able to program it to different options and the throttle...
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    2003 GMC Sierra Fuel Systems Reviews
    Average rating:55 - 1 reviews
    5(5)
    APPEARANCE10
    EASE OF INSTALLATION10
    PRICE/VALUE10
    QUALITY10
    2007 GMC Sierra
    | Posted by | (New Orleans, LA)

    Noticed quick throttle response and smooth acceleration. Plus, better gas mileage.

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    2003 GMC Sierra Models
    • 2003 GMC Sierra 1500 Base Performance Fuel System Parts
    • 2003 GMC Sierra 1500 SL Performance Fuel System Parts
    • 2003 GMC Sierra 1500 SLE Performance Fuel System Parts
    • 2003 GMC Sierra 1500 SLT Performance Fuel System Parts
    • 2003 GMC Sierra 1500 WT Performance Fuel System Parts
    • 2003 GMC Sierra 1500 HD SLE Performance Fuel System Parts
    • 2003 GMC Sierra 1500 HD SLT Performance Fuel System Parts
    • 2003 GMC Sierra 2500 Base Performance Fuel System Parts
    • 2003 GMC Sierra 2500 SLE Performance Fuel System Parts
    • 2003 GMC Sierra 2500 SLT Performance Fuel System Parts
    • 2003 GMC Sierra 2500 WT Performance Fuel System Parts
    • 2003 GMC Sierra 2500 HD Base Performance Fuel System Parts
    • 2003 GMC Sierra 2500 HD SLE Performance Fuel System Parts
    • 2003 GMC Sierra 2500 HD SLT Performance Fuel System Parts
    • 2003 GMC Sierra 2500 HD WT Performance Fuel System Parts
    • 2003 GMC Sierra 3500 Base Performance Fuel System Parts
    • 2003 GMC Sierra 3500 SLE Performance Fuel System Parts
    • 2003 GMC Sierra 3500 SLT Performance Fuel System Parts