2003 GMC C8500 Topkick Engine Parts

Below you will find various in-demand GMC Engine Parts, components and accessories for your 2003 C8500 Topkick. Advance Auto Parts has popular C8500 Topkick parts like Camshafts, Engine Timing Parts, Oil Pumps and more. You’ll also find aftermarket and OEM Engine Parts for other C8500 Topkick model years including 2004, 2005, 2006, 2007, 2008, 2009 and more. Select a category of 2003 GMC C8500 Topkick Engine Parts below and start saving instantly.

Please Select your Vehicle to See Exact Fit Parts

Popular 2003 GMC C8500 Topkick Engine Parts Categories

Engine Valve Lifters

Timing Covers

Oil Pans

Camshaft Position Sensor Connectors

Camshaft Plugs

Turbocharger Intercooler Hose Clamps

Remanufactured Engines

Cylinder Heads

Engine Oil Pump Guide Bushings

Essential Engine Parts for 2003 GMC C8500 Topkicks

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$41.99

ACDelco GM Original Equipment Pigtail Connectors are connectors ready to be spliced into vehicle harnesses, and are GM-recommended replacements for your vehicle’s original components. These original equipment pigtail connectors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:

Protective outer coverings help provide long-lasting durability
Color-coded wires allow for easy installation
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

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$40.99

The flat surface on the original equipment hose clamps tend to apply uneven force on turbocharger pipes and hoses, often causing leaks and a loss of turbo pressure. This Dorman OE FIX Power Band Clamp features a patented curved profile that helps achieve a stronger seal than the factory clamp on boots and pipes. Powerbands are made of stainless steel, and have a low-profile spiral screw for easy installation in tight spaces.

Product Features:

Improved design – this Power Band Clamp’s patented curved profile provides a stronger seal to prevent pressure leaks up to 100 psi
Compact construction – low-profile spiral screw takes less space than the original T-bolt clamp and requires less torque for proper installation
Durable construction – made of tough stainless steel with a fully enclosed screw for strength and durability
Independently tested – validated by a third-party laboratory to ensure a more secure seal

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$5.29

This engine oil pump bushing is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:

Direct replacement – this engine oil pump bushing matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this bushing is a reliable replacement for an original part that has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$619.99

Remanufactured Cylinder Heads are complete rebuild & include new valve stem seals, soft plugs & verified camshafts. All threads are checked and repaired if necessary. Cylinder Heads are packaged in heavy plastic to protect the unit.

Product Features:

All cylinder heads are both vacuum and pressure tested to verify valve seating, & integrity of water passages.
All cylinder heads are packaged in environmentally safe and recyclable containers that are the perfect size for returning your original core
All threads and machined surfaces are and repaired with technology that exceeds the original metal
Non-sealing iron surfaces painted to prevent oxidization

from

$619.99

All cylinder heads are both vacuum and pressure tested to verify valve seating, & integrity of water passages.
All cylinder heads are packaged in environmentally safe and recyclable containers that are the perfect size for returning your original core
All threads and machined surfaces are and repaired with technology that exceeds the original metal
Non-sealing iron surfaces painted to prevent oxidization

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$273.99

This direct replacement timing cover matches the fit and function of the original equipment cover for a reliable repair. This part has undergone extensive testing to ensure adherence to precise design standards.

Product Features:

Direct replacement – this engine timing cover matches the fit and function of the original equipment cover
Durable construction – this part is specifically designed to withstand extreme underhood temperatures for a long service life
Cost-effective solution – offers original equipment quality at a competitive price
Quality tested – this part has undergone extensive testing to ensure a quality fit and long service life

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$1204.99

Oil pan leaking This engine oil pan is precision-engineered to match the original equipment pan on specific vehicle years, makes and models for a reliable replacement.

Product Features:

Direct replacement – this engine oil pan is made to match the original pan on specific vehicles
Complete assembly – includes replacement pan and drain plugs to match original components
Durable design – high-strength coating prevents future corrosion
Trustworthy value – backed by team of engineers and quality control experts in the United States

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$4187.99

Every remanufactured engine is built to OEM or better standards, undergoing rigorous inspection and machining to meet or exceed original factory specifications. The process starts with 100 percent magnaflux crack detection on cast iron blocks, ensuring no hidden flaws compromise durability. Each block is precisely CNC machined and cylinders are honed to exact OEM cross-hatch patterns for optimal performance. Cylinder heads are resurfaced, inspected, and fitted with new valves, seals, and lifters-either OEM remanufactured or the highest-quality aftermarket options, selected based on which offers superior durability and reliability. Comprehensive pressure and vacuum testing guarantees leak-free operation. Only 100 percent new pistons, rings, bearings, seals, and critical components-never recycled-are used to deliver like-new performance and long-term dependability. Before shipment, every engine undergoes cold motored Sims testing to verify compression, oil pressure, torque-to-turn, and overall mechanical integrity. The result is a remanufactured engine engineered for maximum durability, reliability, and performance you can trust.

Product Features:

100 percent Magnaflux Inspection – Detects cracks invisible to the eye for superior reliability.
Cold Motored Sims Testing – Every engine is tested for compression, oil pressure, and proper operation before it ships.
New Pistons, Rings and Bearings – All critical internal components are brand new, never reused.
OEM-Spec CNC Machining – Ensures a perfect fit and factory-quality performance.
DYNAMIC ENGINE TESTING: Sims Testing – All engines are cold motored and checked and measured for proper torque to turn, cylinder compression, oil flow, oil pressure as well as monitored for any unusual noises inside the assembly.
Product might not be available in all states due to local laws.

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$2712.99

Your remanufactured engine is tested in several specific ways after being assembled; Multiple Pressure tests. Each component is carefully checked after being cleaned to see if cracks or other defects exist in the casting. After being assembled, we pressure

Product Features:

Each engine we remanufacture is essentially reverse engineered – in part to discover original factory deficiencies. If possible, our seasoned R&D personnel & QC experts make improvements. Why shouldn’t our engine last longer than your First !
Engines come with installation gasket set & oil pump unless noted otherwise. If we have important installation information it will be included on tags or in the paperwork packaged with your engine.
Engines are securely packaged in a recyclable container that will also protect your core on the return trip. Our nationwide warehouse network means speedy delivery.
Each engine is remanufactured with quality OE level components not “white” box generic parts that may or may not satisfy your needs and expectations. When you use the best you get the best results and satisfaction.

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$9490.00

All Blackwater Engines Long Blocks are balanced, blueprinted, and updated through reverse engineering. All cylinder blocks are torque plate honed. All long blocks are reassembled using high quality OE or ISO 9001 provider parts. Does not include oil pan, front cover, rear cover, or fuel injection system. Every assembly is tested on state-of-the-art test equipment to ensure compression, oil pressure, and coolant system integrity.

Product Features:

Call 1-877-421-4317 for customer service, availability, and technical support.
Includes Long Block, Oil Pump, Gasket Set
Stock Replacement No Upgrades
Must replace oil cooler, injectors, and air compressor if equipped and connected to the engine oiling system or cooling system
Prime the oil system fully before startup
Prime the oil system fully before startup

from

$4503.99

Each engine we remanufacture is essentially reverse engineered – in part to discover original factory deficiencies. If possible, our seasoned R&D personnel & QC experts make improvements. Why shouldn’t our engine last longer than your First !
Engines come with installation gasket set & oil pump unless noted otherwise. If we have important installation information it will be included on tags or in the paperwork packaged with your engine.
Engines are securely packaged in a recyclable container that will also protect your core on the return trip. Our nationwide warehouse network means speedy delivery.
Each engine is remanufactured with quality OE level components not “white” box generic parts that may or may not satisfy your needs and expectations. When you use the best you get the best results and satisfaction.

from

$3533.00

100 percent Magnaflux Inspection – Detects cracks invisible to the eye for superior reliability.
Cold Motored Sims Testing – Every engine is tested for compression, oil pressure, and proper operation before it ships.
New Pistons, Rings and Bearings – All critical internal components are brand new, never reused.
OEM-Spec CNC Machining – Ensures a perfect fit and factory-quality performance.
DYNAMIC ENGINE TESTING: Sims Testing – All engines are cold motored and checked and measured for proper torque to turn, cylinder compression, oil flow, oil pressure as well as monitored for any unusual noises inside the assembly.
Product might not be available in all states due to local laws.

from

$4259.00

100 percent Magnaflux Inspection – Detects cracks invisible to the eye for superior reliability.
Cold Motored Sims Testing – Every engine is tested for compression, oil pressure, and proper operation before it ships.
New Pistons, Rings and Bearings – All critical internal components are brand new, never reused.
OEM-Spec CNC Machining – Ensures a perfect fit and factory-quality performance.
DYNAMIC ENGINE TESTING: Sims Testing – All engines are cold motored and checked and measured for proper torque to turn, cylinder compression, oil flow, oil pressure as well as monitored for any unusual noises inside the assembly.
Product might not be available in all states due to local laws.

from

$9490.00

Call 1-877-421-4317 for customer service, availability, and technical support.
Includes Long Block, Oil Pump, Gasket Set
Stock Replacement No Upgrades
Must replace oil cooler, injectors, and air compressor if equipped and connected to the engine oiling system or cooling system
Prime the oil system fully before startup
Prime the oil system fully before startup

from

$2.99

This engine camshaft plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:

Direct replacement – this engine camshaft plug matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this plug is a reliable replacement for an original part that is missing or has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

Upgrade your 2003 GMC C8500 Topkick with Top-Quality Engine Parts

When it comes to maintaining or upgrading your 2003 GMC C8500 Topkick, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your GMC or enhancing its overall performance, Engine Parts are key to keeping your C8500 Topkick functioning at its best. At Advance Auto Parts, we offer a wide selection of 10 Engine Parts for the 2003 GMC C8500 Topkick, designed to meet your needs without breaking the bank. From Camshaft replacements to Engine Timing Parts upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Engine Parts for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Engine Parts for your 2003 GMC C8500 Topkick at great prices. Our Engine Parts inventory for this model ranges from just $2.99 to $4,187.99, with an average price of $564.28. Our 10 Engine Parts in stock come from 5 trusted brands, so you’re sure to find the right part for your 2003 GMC C8500 Topkick without overspending.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Engine Part upgrades. Explore related part types like Batteries and Chargers, Fluids and Chemicals and more to make sure your 2003 GMC C8500 Topkick is always ready to roll. We’re committed to providing you with everything you need to keep your C8500 Topkick in top shape, all in one place. Start shopping confidently below for your 2003 GMC C8500 Topkick!

Best-Selling Camshafts for 2003 GMC C8500 Topkicks

Enhance the driving experience in your GMC with 2 quality Camshaft components, starting at $2.99.

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from

$41.99

Protective outer coverings help provide long-lasting durability
Color-coded wires allow for easy installation
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

from

$2.99

Direct replacement – this engine camshaft plug matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this plug is a reliable replacement for an original part that is missing or has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

Top Picks for 2003 GMC C8500 Topkick Oil Pumps

Upgrade GMC C8500 Topkicks with top-quality Oil Pumps parts, including 1 OEM and aftermarket selections for your 2003 model.

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from

$5.29

Direct replacement – this engine oil pump bushing matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this bushing is a reliable replacement for an original part that has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

In-Demand Oil Pans for 2003 GMC C8500 Topkicks

Select from 1 premium Oil Pans parts for your 2003 GMC C8500 Topkick.

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from

$1204.99

Oil pan leaking This engine oil pan is precision-engineered to match the original equipment pan on specific vehicle years, makes and models for a reliable replacement.

Product Features:

Direct replacement – this engine oil pan is made to match the original pan on specific vehicles
Complete assembly – includes replacement pan and drain plugs to match original components
Durable design – high-strength coating prevents future corrosion
Trustworthy value – backed by team of engineers and quality control experts in the United States

Most Sold 2003 GMC C8500 Topkick Valve Cover and Cylinder Heads

Explore our best-selling GMC parts for the 2003 C8500 Topkick among 3 OEM and aftermarket options starting from $36.99.

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$619.99

All cylinder heads are both vacuum and pressure tested to verify valve seating, & integrity of water passages.
All cylinder heads are packaged in environmentally safe and recyclable containers that are the perfect size for returning your original core
All threads and machined surfaces are and repaired with technology that exceeds the original metal
Non-sealing iron surfaces painted to prevent oxidization

from

$619.99

All cylinder heads are both vacuum and pressure tested to verify valve seating, & integrity of water passages.
All cylinder heads are packaged in environmentally safe and recyclable containers that are the perfect size for returning your original core
All threads and machined surfaces are and repaired with technology that exceeds the original metal
Non-sealing iron surfaces painted to prevent oxidization

OE-Style Hydraulic Roller Lifter for '96+ Chevrolet GEN VI Big Block and 8.1L

from

$36.99

OE-Style Hydraulic Roller Lifter for ’96+ Chevrolet GEN VI Big Block and 8.1L

FAQs for 2003 GMC C8500 Topkick Engine Parts

Which Engine Parts are best-sellers for 2003 GMC C8500 Topkicks?

Out of 10 Engine Parts that fit 2003 GMC C8500 Topkicks, the following parts are the top sellers:

Black Multi-Purpose Pigtail (11895342) – $41.99
Oil Pump Bushing (22149600) – $5.29
OE-Style Hydraulic Roller Lifter for ’96+ Chevrolet GEN VI Big Block and 8.1L (50286846) – $36.99

What’s the price range for 2003 GMC C8500 Topkick Engine Parts?

Engine Part prices for the 2003 GMC C8500 Topkick start at $2.99 and go up to $4,187.99 for the most premium parts.

What’s the average price of a Engine Part for a 2003 GMC C8500 Topkick?

The average price for Engine Parts for the 2003 GMC C8500 Topkick is $564.28. Keep in mind the variety of part types within our Engine Part category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Engine Parts for other GMC C8500 Topkick model years?

Yes, we currently carry Engine Parts for 5 model years of GMC C8500 Topkicks between 2004 and 2009. Engine Parts are bought most frequently for the following model years: 2009, 2008, 2007, 2006, 2005, and 2004.

What are the cheapest Engine Parts for my 2003 GMC C8500 Topkick?

The cheapest 2003 GMC C8500 Topkick Engine Parts we carry in stock are:

Steel Cup Expansion Plug 2-7/31 In. SC, Height 0.260 (sold by each) (22140441) – $2.99
Oil Pump Bushing (22149600) – $5.29
OE-Style Hydraulic Roller Lifter for ’96+ Chevrolet GEN VI Big Block and 8.1L (50286846) – $36.99
Power Band Clamp 2 – 2.5 Inch (OE Fix) (12592558) – $40.99
Black Multi-Purpose Pigtail (11895342) – $41.99

What types of Engine Parts do you sell for my 2003 GMC C8500 Topkick?

As of 6/2/26, these are some of the most in-demand types of Engine Parts for a 2003 GMC C8500 Topkick:

Can I get help with 2003 GMC C8500 Topkick Engine Part orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about GMC Engine Parts and more.

What is your return policy for GMC C8500 Topkick Engine Parts?

Advance Auto Parts keeps returns simple. For new GMC C8500 Topkick Engine Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

2003 GMC C8500 Topkick Engine Parts

GM Genuine Parts – Black Multi-Purpose Pigtail (Part No.PT2782)

Dorman – Help – Power Band Clamp 2 – 2.5 Inch (OE Fix) (Part No.55244)

Dorman – Help – Oil Pump Bushing (Part No.90460)

Spartan – Engine Cylinder Head; Chevrolet 8.1/496 01-06 Right Head (Part No.2CW2R)

Spartan – Engine Cylinder Head; Chevrolet 8.1/496 01-06 Left Head (Part No.2CW2L)

Dorman – HD Solutions – Timing Cover Kit (Part No.635-4999)

Dorman – HD Solutions – Engine Oil Pan: Direct Fit, Steel, Sump, 22 Quart (Part No.264-5012)

Premium Drive Train – Premium Remanufactured Engine Long Block Assembly (Part No.L49602VT)

Spartan – Engine Long Block; Chevrolet 4.8 V8 99-07 Engine (Part No.DCTC)

Blackwater Engines – Long Block Engine 7.2L Caterpillar C7 2nd Style Stock Replacement (Part No.AAB72AG01)

Spartan – Engine Long Block; Chevrolet 8.1/496 04-06 Engine (Part No.DCWE)

Premium Drive Train – Premium Remanufactured Engine Long Block Assembly (Part No.L4807GMC)

Premium Drive Train – Premium Remanufactured Engine Long Block Assembly (Part No.L49604VT)

Blackwater Engines – Long Block Engine 7.2L Caterpillar C7 3rd Style Stock Replacement (Part No.AAB72AH01)

Dorman – Steel Cup Expansion Plug 2-7/31 In. SC, Height 0.260 (sold by each) (Part No.555-081)

GM Genuine Parts – Black Multi-Purpose Pigtail (Part No.PT2782)

Dorman – Steel Cup Expansion Plug 2-7/31 In. SC, Height 0.260 (sold by each) (Part No.555-081)

Dorman – HD Solutions – Timing Cover Kit (Part No.635-4999)

Dorman – Help – Oil Pump Bushing (Part No.90460)

Dorman – HD Solutions – Engine Oil Pan: Direct Fit, Steel, Sump, 22 Quart (Part No.264-5012)

Spartan – Engine Cylinder Head; Chevrolet 8.1/496 01-06 Right Head (Part No.2CW2R)

Spartan – Engine Cylinder Head; Chevrolet 8.1/496 01-06 Left Head (Part No.2CW2L)

Competition Cams – OE-Style Hydraulic Roller Lifter for ’96+ Chevrolet GEN VI Big Block and 8.1L (Part No.900-1)