2003 GMC C8500 Topkick Fuel Injectors
Keep Your 2003 GMC C8500 Topkick in Top Shape with Quality Fuel Injectors
Whether you’re repairing or upgrading your Fuel Injector, using high-quality parts is key to keeping your 2003 GMC C8500 Topkick looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Fuel Injectors, Pressure Regulators, and Fuel Injector Gaskets. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.
Top-Rated Fuel Injectors from Trusted Brands
Looking for a reliable Fuel Injector? We’ve got you covered with options from brands you know and trust like Delphi and GM Genuine. For example, Delphi Fuel Injectors start at just $149.99 with an average 4.2 star rating. GM Genuine offer similar pricing and quality, backed by strong customer feedback. With over 24 reviews and a solid 4 star average, you can shop with confidence knowing other GMC C8500 Topkick owners approve.
Competitive Prices and Extensive Inventory
The average price for a 2003 GMC C8500 Topkick Fuel Injector at Advance Auto Parts is around $174.59, with a range that starts at $7.99 and goes up to $359.99. With 6 options in stock from 2 trusted brands, finding the right fit is easy. Popular picks like Fuel Injection Pressure Regulator Kit with Clip and Snap Ring, Fuel Injector O-Ring Kit with Assorted O-Rings, and Fuel Injector Retainer Kit with Clip start at just $13.79 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Fuel Injector, don’t forget to check out other key components like Fuel Pumps and Vacuum Pumps. At Advance Auto Parts, we’re here to help you keep your 2003 GMC C8500 Topkick in peak condition, inside and out.
Find Your Specific 2003 GMC C8500 Topkick Fuel Injectors
Looking for the perfect Fuel Injector for your 2003 GMC C8500 Topkick? You’re in the right place. Below, you’ll find links to various types of Fuel Injectors that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Fuel Injectors, ensuring durability and a precise fit for your GMC C8500 Topkick. Whether you’re driving a 2003 model or another popular model year like
2004,
2005,
2006,
2007,
2008, and
2009, we’ve got you covered. Purchasing Fuel Injectors from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Fuel Injectors that fit your vehicle.
Essential 2003 GMC C8500 Topkick Fuel Injectors
Delphi – Fuel Injector (Part No.EX634761)
from
$699.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.
Product Features:
See More
Product Features:
- 100% O Ring replacement
- All Delphi injectors are tested utilizing OE methodologies
- Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
- No internal seal rings equals minimized leakage
- Recessed fuel exit minimizing possible plugging
- Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
- Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
Delphi – Fuel Injector (Part No.EX634762)
from
$724.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.
Product Features:
See More
Product Features:
- 100% O Ring replacement
- All Delphi injectors are tested utilizing OE methodologies
- Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
- No internal seal rings equals minimized leakage
- Recessed fuel exit minimizing possible plugging
- Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
- Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
Delphi – Fuel Injector (Part No.EX639349)
from
$359.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.
Product Features:
See More
Product Features:
- 100% O Ring replacement
- All Delphi injectors are tested utilizing OE methodologies
- Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
- No internal seal rings equals minimized leakage
- Recessed fuel exit minimizing possible plugging
- Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
- Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
GM Genuine Parts – Fuel Injector Retainer Kit with Clip (Part No.12570620)
from
$13.79
GM Genuine Parts Fuel Injector and Insulator Retainer Kits are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).
Product Features:
See More
Product Features:
- This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
- Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
- GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
- GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
- GM regularly updates production and service part designs to integrate new materials and technologies
GM Genuine Parts – Fuel Injection Throttle Body Mounting Gasket (Part No.12570168)
from
$7.99
GM Genuine Parts Fuel Injection Throttle Body Mounting Gaskets are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These gaskets help provide an air-tight seal between the throttle body and the intake manifold, and are GM-recommended replacements for your vehicle’s original components. Replace this gasket whenever you service the throttle body, as leaks can negatively affect the air/fuel ratio and compromise performance. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).
Product Features:
See More
Product Features:
- Helps prevent excess air form entering the intake
- Helps seal the intake and throttle from the elements
- Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
- GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
- GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
- GM regularly updates production and service part designs to integrate new materials and technologies
GM Genuine Parts – Multi-Port Fuel Injector O-Ring Kit with 16 O-Ring (Part No.217-1533)
from
$31.99
GM Genuine Parts Fuel Injector Seal Kits are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These seals help provide liquid-tight connections between the fuel injector and related components. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).
Product Features:
See More
Product Features:
- Helps provide a seal to prevent fuel leaks
- Helps seal combustion chamber from the elements
- Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
- GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
- GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
- GM regularly updates production and service part designs to integrate new materials and technologies
GM Genuine Parts – Fuel Injector O-Ring Kit with Assorted O-Rings (Part No.217-1588)
from
$29.99
GM Genuine Parts Fuel Injector Seal Kits are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These seals help provide liquid-tight connections between the fuel injector and related components. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).
Product Features:
See More
Product Features:
- Helps provide a seal to prevent fuel leaks
- Helps seal combustion chamber from the elements
- Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
- GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
- GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
- GM regularly updates production and service part designs to integrate new materials and technologies
Delphi – Mass Air Flow Sensor (Part No.AF10043)
from
$149.99
Every single Delphi mass air flow (MAF) sensor that we manufacture – whether with or without the housing – is built with calibrated all-new components and is never remanufactured. Our mass air flow sensors are designed and tested to meet or exceed OE requirements, and engineered for a perfect fit in more than 180 million vehicles on the road today in North America – including makes from Ford, Toyota, Nissan, Volkswagen, Hyundai, BMW, Honda, GM, Mazda, Subaru, Acura and more.
Product Features:
See More
Product Features:
- Delphi mass air flow sensors are the global benchmark for accuracy and signal noise
- Delphi mass air flow sensors feature high quality sensing elements for outstanding performance over a wide range of ambient temperatures
- Delphi is a manufacturer of OE mass air flow sensors since their first use over 30 years ago
- All parts are calibrated and tested to match the OE part
- Probe solution offered wherever possible to reduce repair time by eliminating the need to replace the flow tube
- Delphi OE technology validated to match the vehicle applications
GM Genuine Parts – Fuel Injection Pressure Regulator Kit with Clip and Snap Ring (Part No.217-3073)
from
$114.99
ACDelco GM Original Equipment Fuel Injection Pressure Regulators are mechanical valves that control fuel pressure in the fuel injector rail, and are GM-recommended replacements for your vehicle’s original components. Their spring-loaded valves return excess fuel back to the fuel tank. These original equipment fuel injection pressure regulators have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.
Product Features:
See More
Product Features:
- Helps provide constant fuel pressure to the injectors
- Assists in cold engine starts
- Helps maintain stable engine idle
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specification for fit, form, and function
Popular 2003 GMC C8500 Topkick Fuel Injectors Categories
Most Popular Fuel Injector for 2003 GMC C8500 Topkicks
Enhance your 2003 GMC C8500 Topkick with this popular Fuel Injector we have in stock, for $359.99.
Delphi – Fuel Injector (Part No.EX639349)
from
$359.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.
Product Features:
See More
Product Features:
- 100% O Ring replacement
- All Delphi injectors are tested utilizing OE methodologies
- Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
- No internal seal rings equals minimized leakage
- Recessed fuel exit minimizing possible plugging
- Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
- Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
Best-Selling 2003 GMC C8500 Topkick Pressure Regulator
Upgrade your C8500 Topkick with our best-selling Pressure Regulator with a 1 Starts rating across 2 reviews.
GM Genuine Parts – Fuel Injection Pressure Regulator Kit with Clip and Snap Ring (Part No.217-3073)
from
$114.99
ACDelco GM Original Equipment Fuel Injection Pressure Regulators are mechanical valves that control fuel pressure in the fuel injector rail, and are GM-recommended replacements for your vehicle’s original components. Their spring-loaded valves return excess fuel back to the fuel tank. These original equipment fuel injection pressure regulators have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.
Product Features:
See More
Product Features:
- Helps provide constant fuel pressure to the injectors
- Assists in cold engine starts
- Helps maintain stable engine idle
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specification for fit, form, and function
Top-Quality Fuel Injector Gaskets for 2003 GMC C8500 Topkicks
Choose a high-quality OEM or aftermarket Fuel Injector Gasket for GMC C8500 Topkicks and enjoy top-notch performance from $7.99.
GM Genuine Parts – Fuel Injection Throttle Body Mounting Gasket (Part No.12570168)
from
$7.99
GM Genuine Parts Fuel Injection Throttle Body Mounting Gaskets are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These gaskets help provide an air-tight seal between the throttle body and the intake manifold, and are GM-recommended replacements for your vehicle’s original components. Replace this gasket whenever you service the throttle body, as leaks can negatively affect the air/fuel ratio and compromise performance. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).
Product Features:
See More
Product Features:
- Helps prevent excess air form entering the intake
- Helps seal the intake and throttle from the elements
- Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
- GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
- GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
- GM regularly updates production and service part designs to integrate new materials and technologies
Our Top Pick for a 2003 GMC C8500 Topkick Fuel Injector Seal Kit
Invest in a
durable Fuel Injector Seal Kit for your 2003 GMC, knowing you’re getting trusted brands and expert craftsmanship.
GM Genuine Parts – Fuel Injector O-Ring Kit with Assorted O-Rings (Part No.217-1588)
from
$29.99
GM Genuine Parts Fuel Injector Seal Kits are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These seals help provide liquid-tight connections between the fuel injector and related components. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).
Product Features:
See More
Product Features:
- Helps provide a seal to prevent fuel leaks
- Helps seal combustion chamber from the elements
- Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
- GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
- GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
- GM regularly updates production and service part designs to integrate new materials and technologies
Our Top-Rated Air Flow Meters and Mass Air for 2003 GMC C8500 Topkicks
Make a smart move for your 2003 GMC C8500 Topkick with our Air Flow Meters and Mass Air for $149.99.
Delphi – Mass Air Flow Sensor (Part No.AF10043)
from
$149.99
Every single Delphi mass air flow (MAF) sensor that we manufacture – whether with or without the housing – is built with calibrated all-new components and is never remanufactured. Our mass air flow sensors are designed and tested to meet or exceed OE requirements, and engineered for a perfect fit in more than 180 million vehicles on the road today in North America – including makes from Ford, Toyota, Nissan, Volkswagen, Hyundai, BMW, Honda, GM, Mazda, Subaru, Acura and more.
Product Features:
See More
Product Features:
- Delphi mass air flow sensors are the global benchmark for accuracy and signal noise
- Delphi mass air flow sensors feature high quality sensing elements for outstanding performance over a wide range of ambient temperatures
- Delphi is a manufacturer of OE mass air flow sensors since their first use over 30 years ago
- All parts are calibrated and tested to match the OE part
- Probe solution offered wherever possible to reduce repair time by eliminating the need to replace the flow tube
- Delphi OE technology validated to match the vehicle applications
Top-Rated Fuel Injector Brands For Your 2003 GMC C8500 Topkick
When it comes to finding the perfect Fuel Injector for your 2003 GMC C8500 Topkick, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 2 trusted brands. We carry the most popular Fuel Injector brands including GM Genuine and Delphi, and more, all known for their exceptional customer ratings (average brand rating of 4.6 stars) and competitive prices, as low as $29.99. Purchasing a Fuel Injector from us here at Advance Auto Parts is a smart move for both you and your 2003 GMC C8500 Topkick, providing peace of mind with parts that meet or exceed OEM standards.
Popular GM Genuine 2003 GMC C8500 Topkick Fuel Injectors
If you’re looking for a top-quality Fuel Injector for your 2003 GMC C8500 Topkick, Advance Auto Parts has exactly what you need with our selection of GM Genuine Fuel Injectors. We have 1 GM Genuine Fuel Injectors in stock for this fitment, all known for their durability and precision fit. With prices starting at just $29.99, you’ll find the perfect Fuel Injector for your needs and budget. GM Genuine Fuel Injectors for the 2003 GMC C8500 Topkick come highly rated, with over 1 customer reviews and an impressive average rating of 4.6 stars. Choosing a GM Genuine Fuel Injector from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
from
$29.99
(1)
Fuel Injector O-Ring Kit with Assorted O-Rings
“Exactly what my son needed!! Awesome FREE home delivery option via DoorDash!!”
Top-Quality Delphi 2003 GMC C8500 Topkick Fuel Injectors
For those in search of a high-quality Fuel Injector for their 2003 GMC C8500 Topkick, Advance Auto Parts offers a great selection of Delphi Fuel Injectors. With 1 Delphi Fuel Injectors in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Fuel Injectors start at just $149.99, giving you a range of options to suit your budget. Backed by over 21 customer ratings and an average rating of 4.2 stars, Delphi Fuel Injectors provide both reliability and excellent performance. Choosing a Delphi Fuel Injector from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
FAQs for 2003 GMC C8500 Topkick Fuel Injectors
What are the best-selling Fuel Injectors for 2003 GMC C8500 Topkicks?
Out of 6 Fuel Injectors that fit 2003 GMC C8500 Topkicks, the following parts are the top sellers:
- Fuel Injection Pressure Regulator Kit with Clip and Snap Ring (15730435) – $114.99
- Fuel Injector O-Ring Kit with Assorted O-Rings (18057408) – $29.99
- Fuel Injector Retainer Kit with Clip (12151905) – $13.79
What’s the price range for 2003 GMC C8500 Topkick Fuel Injectors?
The prices of Fuel Injectors for the 2003 GMC C8500 Topkick range from $7.99 up to $359.99 for the most premium parts.
What is the average price of a Fuel Injector for a 2003 GMC C8500 Topkick?
The average price for Fuel Injectors for the 2003 GMC C8500 Topkick is $174.59. Keep in mind the variety of part types within our Fuel Injector category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Fuel Injectors for other GMC C8500 Topkick model years?
What are the cheapest Fuel Injectors for my 2003 GMC C8500 Topkick?
The cheapest 2003 GMC C8500 Topkick Fuel Injectors we carry are:
- Fuel Injection Throttle Body Mounting Gasket (11930886) – $7.99
- Fuel Injector Retainer Kit with Clip (12151905) – $13.79
- Fuel Injector O-Ring Kit with Assorted O-Rings (18057408) – $29.99
- Fuel Injection Pressure Regulator Kit with Clip and Snap Ring (15730435) – $114.99
- Mass Air Flow Sensor (20973820) – $149.99
Does Advance Auto Parts sell Fuel Injectors for any other 2003 GMC models?
Yes. We stock Fuel Injectors for 19 other popular 2003 GMC models. Some of the most popular are 2003 Yukon Fuel Injectors, 2003 Sierra 1500 Fuel Injectors, 2003 Yukon XL 1500 Fuel Injectors, 2003 Sierra 2500 HD Fuel Injectors, and 2003 Yukon XL 2500 Fuel Injectors.
What are the top-rated Fuel Injectors that fit the 2003 GMC C8500 Topkick?
Based on 24 reviews by customers, our 2003 GMC C8500 Topkick Fuel Injectors have an average customer rating of 4 stars. These are the highest-rated categories of Fuel Injectors for the 2003 GMC C8500 Topkick and their top-rated products:
- Air Flow Meters and Mass Air
- Mass Air Flow Sensor (20973820) – $149.99
- Fuel Injector Seal Kits
- Fuel Injector O-Ring Kit with Assorted O-Rings (18057408) – $29.99
What types of Fuel Injectors do you sell for my 2003 GMC C8500 Topkick?
As of 6/2/26, these are some of the most in-demand types of Fuel Injectors for a 2003 GMC C8500 Topkick:
Can I get help with 2003 GMC C8500 Topkick Fuel Injector orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about GMC Fuel Injectors and more.
What is your return policy for GMC C8500 Topkick Fuel Injectors?
Advance Auto Parts keeps returns simple. For new GMC C8500 Topkick Fuel Injectors and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.