Summit Racing SpeedCard - learn how to get 10% back up to $100

Summit Racing SpeedCard - learn how to get 10% back up to $100

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2003 CHEVROLET SILVERADO-2500-HD Parts and Accessories

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Results 1 - 24 of 647

ACDelco Rear Main Seal Housings

ACDelco offers rear main seal housings for a wide range of year/make and engine applications. The one-piece aluminum replacements are designed, engineered, tested, and backed by General Motors. They are validated OE parts for specific Chevrolet, Buick, GMC, and Cadillac vehicles. These components are designed to give the engine oil leak protection from between the crankshaft output flange and the engine block. Order the engine crankshaft seal housing recommended for your ride.

4.43 out of 5 stars ( 7 )

$65.99

Melling High-Volume Oil Pumps

Melling high-volume oil pumps give you an additional 20 to 25 percent of much-needed oil volume for your performance application. For those of you who need added pressure, many pumps are supplied with a high-pressure spring (where noted). The pumps are built using a proprietary casting process, which yields maximum performance and reliability. Every Melling oil pump is completely pressure-tested, including idle and bypass pressure, before it leaves the factory. Dozens of models are available for fitment; order the pump and options needed for your vehicle.

4.62 out of 5 stars ( 346 )

$81.99

Fel-Pro Timing Cover Gaskets

The chain of command between a crankshaft, camshaft, and engine valves is central to your vehicle's basic movement—which is why it's so important to protect the timing belt. Fel-Pro timing cover gaskets provide a tight seal to keep contaminants out of the gear shaft area. They're offered in hundreds of single or multi-piece sets for OE-style fitment on a wide variety of cars, trucks, vans, and SUVs; gaskets for industrial use are also available. Ideal for stock replacement (not intended for racing applications), Fel-Pro gaskets are made from materials such as fiber, cork, and rubber. Choose the kit which corresponds to your year/make and engine application.

4.76 out of 5 stars ( 541 )

$50.99

ACDelco GM Genuine Parts Knock Sensors

ACDelco GM Genuine Parts knock sensors are the GM recommended replacement for the vehicles original component. They monitor the engine for pinging or spark knock. The sensors create a voltage signal based on the vibrations caused by erratic air/fuel mixture combustion. The engine control module then uses that signal to adjust the ignition timing and air/fuel mixture. These GM Genuine Parts knock sensors have been manufactured to fit your GM vehicle, providing you with the same performance, durability, and service life you have come to expect from General Motors.

4.65 out of 5 stars ( 104 )

$62.99

King XP-Series Rod Bearings

King XP-Series rod bearings feature advanced metallurgical and geometric technologies that meet extreme performance loads. They were developed for all performance applications that use forged steel aftermarket crankshafts and produce high loads for extended periods. King focuses on one product—bearings—and nothing else. Their innovative race-only Xtreme Performance Max Black Tri-Metal rod bearings have a 24 percent stronger overlay and 17 percent more fatigue strength by using a micro process called SecureBond. Built with enhanced tri-metal, King XP-Series rod bearings layer copper-lead construction with a nickel plate barrier and a lead/tin/copper Babbitt overlay over a steel backing in an adhesion process that provides superior stability and durability. King's advanced control measures hit a bull's-eye, maintaining wall thickness tolerances far tighter than their competitors—at an amazing +/- .0001 in.! XP-Series rod bearings are narrowed on the crank cheek side with increased crush height for improved bearing-to-bore contact, heat transfer, and reduced spin potential in high-rpm applications.

4.64 out of 5 stars ( 66 )

$69.99

$109.99

Hayden Rapid-Cool Transmission Oil Coolers

Hayden Rapid-Cool transmission oil coolers take the heat, so your vehicle won't! Over 14-million transmissions fail every year, and 9 out of 10 are from overheating. Rapid-Cool's unique plate and fin design combines cooling expertise and space efficiency; multiple sizes are available. Their patented internal turbulation provides better heat transfer. Lower your operating temps with a pioneer in cooling: Hayden!

4.7 out of 5 stars ( 159 )

$50.99

$62.99

Dorman Knock Sensor Kits

Is your check engine light on and vehicle running rough? Could be a failed knock sensor. Dorman knock sensor kits combine the necessary sensor and wiring harness that joins them for a complete repair in one package. Features include: * Plug-and-play installation--matches original wiring harness, requiring no cutting or splicing * Quality assured--benchmarked against original components for performance and quality * Excellent value--original equipment quality at significant cost savings

3.35 out of 5 stars ( 20 )

$77.95

ACDelco Engine Oil Pressure Indicator Switches

ACDelco engine oil pressure indicator switches are quality replacement parts you can feel good about installing. They offer the fit, form, and function—along with value—you expect and want. ACDelco has a wide selection of components to optimize your GM vehicle's performance, as well as products to cover many other makes and models. Order the ACDelco oil pressure safety switch designed for your specific vehicle.

4.56 out of 5 stars ( 25 )

$58.99

ACL Performance Race Series Rod Bearing Sets

ACL Performance offers Race Series rod bearing sets for a wide range of vehicles. These high performance tri-metal engine bearings are designed to withstand higher RPM conditions. They feature a high-strength overlay plate with reduced thickness for improved fatigue properties. Select the crankshaft undersize and quantity recommended for your year/make and engine application. Additional details: * Hardened steel backs on all rod bearings to improve the support of the bearing lining and assist with bearing retention in the housing. * Increased crush for improved bearing retention * Elimination of flash plating on the back of the bearings to improve heat transfer through the bearings and to maximize the grip between the bearings and its housing * Increased eccentricity to compensate for bore distortion at high RPM and to assist in the formation of hydrodynamic oil films * 3/4 in. grooved main bearings to optimize bearing load carrying surface area and oil flow to the conrod bearings * Tight consistent wall tolerances to help you maintain consistent clearances * Enlarged ID chamfers on bearing edges (where required) to accommodate large fillet radius on performance crankshafts

5.0 out of 5 stars ( 8 )

$83.99

$94.99

Cometic MLS Head Gaskets

Cometic MLS head gaskets are constructed from multiple layers of stainless steel for strength and contain load-controlled embossments that conform load distribution across the sealing area. This creates an exceptional seal by requiring less clamp load—resulting in less bore distortion. The stainless steel outer layers utilize FKM (Viton®) rubber coating, a high-temperature and chemical-resistant polymer. A topcoat of PTFE aids in resistance to fret and increased cold sealing. MLS head gaskets are available for most aftermarket cylinder heads; as with all of Cometic's MLS head gaskets, no sealants or re-torque is required.

4.65 out of 5 stars ( 542 )

$87.95

$103.89

Chevrolet Performance Composition Head Gaskets

Chevrolet Performance composition head gaskets are recommended for stock and mildly modified engines. They're available in a variety of bores, compressed thicknesses, and volumes for fitment on specific vehicle and engine applications.

4.65 out of 5 stars ( 118 )

$63.99

Belltech Street Performance Shocks

Belltech Street Performance twin-tube shocks set the standard in performance handling for sport trucks. Their low-speed compression characteristics help to control pitch and roll, while their progressive rebound tuning allows you to use large aftermarket wheels and still have a smooth, firm ride. Get the performance and quality that you're looking for when you order the Belltech Street Performance shock models designed for your application. Other features may include (application dependent): * Oversized galvanized steel shock bodies with steel dust covers * Sturdy 35mm valves and 15mm or 18mm piston rods * Available vehicle-specific or adjustable damping tunes * Progressive-rate polymer bump stops

4.67 out of 5 stars ( 499 )

$79.95

MBRP Intermediate Exhaust Pipes

MBRP intermediate exhaust pipes will keep the flow movin'! These pipes are constructed from heavy-duty aluminized steel, with smooth bends for the best flow and lasting service. Plus, you'll gain extra power and EGT reduction. Increase the power and efficiency of your diesel with MBRP intermediate exhaust pipes.

5.0 out of 5 stars ( 11 )

$104.99

$109.99

On Sale

Summit Racing™ 86 Series 8mm 300 Ohm Ignition Wires

With Summit Racing branded all 100% silicone 8mm constructed wire, a 300ohm per foot wire wound EMI suppression core, high heat silicone boots and stainless steel and brass terminals, you get all the high end features a wire set can offer, without breaking the bank! The dual silicone High-Tear resistant jacketing with fiberglass matting, gives you the highest heat protection and superior terminal pull off values in the business! With our 300ohm per foot Wire-Wound magnetic suppression core, you can be sure of maximizing the voltage output of your ignition system, while maintaining high EMI resistance values. Stainless steel terminals with Posi-lock hardened clips and brass terminals are used for superior connection and consistent voltage delivery. Ultra High heat silicone spark plug boots provide superior radiant heat protection. High dielectric strength properties virtually eliminate voltage leakage and blow through. With all of these features built into our Summit Racing high-end 8mm sets, along with Made in the USA workmanship, you can be assured that installing one of our sets will give you the confidence and reliability you have come to expect from Summit Racing products.

4.51 out of 5 stars ( 1008 )

$55.99

$57.99

King HP-Series Rod Bearings

King HP-Series rod bearings were developed mainly for drag race applications needing a material harder than the Babbitt top layer. These applications demanded a structure that could withstand high loads for short durations and still offer higher embeddability and compatibility. In response, King developed the HP-Series, featuring the Alecular metal structure. The HP-Series is also suited for many performance applications with nodular cast iron crankshafts, such as street, strip, and some levels of Circle Track racing. Order the set recommended for your vehicle. HP-Series bearings are particularly suitable for the following cases: * When a tri-metal bearing's Babbitt overlay extrudes over the sides, migrates to one end, or is physically removed by the crankshaft * When the intermediate layer of a tri-metal bearing is exposed, damaging the crank journal and requiring expensive grinding or replacement * When contaminants enter the oil stream, scratching and damaging the crankshaft journals

4.66 out of 5 stars ( 35 )

$69.99

$108.99

ACDelco GM Genuine Parts Oil Pan Gaskets

ACDelco GM Genuine Parts oil pan gaskets are genuine parts that will provide the same performance, durability, and service life as the factory originals. Choosing the best quality to maintain your GM vehicle is easy--ACDelco GM Genuine Parts has the right fit, function, and form for confident, hassle-free service.

5.0 out of 5 stars ( 4 )

$54.99

Sealed Power MA Series Main Bearings

These Sealed Power MA Series main bearings can actually polish the journals on your crankshaft. That's because there's a small percentage of silicon mixed in with the aluminum and tin that make up the bearing-surface alloy. The silicon is there for wear resistance, but its toughness actually smoothes the journals of a crank whose surface hasn't been optimized! This special surface alloy is laid over a high-strength 1010 steel backing and delivers improved seizure and corrosion resistance, as well as better control of wall variance. It also helps to minimize debris embedding, which can score the crank's surface.

4.29 out of 5 stars ( 75 )

$92.99

$109.99

Dorman Rear Main Seal Covers

Use Dorman engine rear main seal covers to ensure the proper sealing of your engine, to stop and/or prevent engine oil leakage. They are made from high-quality materials and are available as direct replacements for a proper fit on various makes and models. Whatever your repair needs, Dorman has just what you're after!

3.6 out of 5 stars ( 10 )

$53.95

ACDelco Ignition Coils

Failure or poor performance from a coil can result in a misfire, a rough-running, hard-starting engine, and excessive emissions. ACDelco ignition coils provide the performance needed to help keep vehicles running the way that they were designed. These coils have corrosion-protected laminations to guard them from the harsh operating environment. Primary and secondary coil windings often feature molded plastic protection. Order the replacement model designed for your vehicle and engine application.

4.59 out of 5 stars ( 27 )

$57.99

$88.99

Melling Timing Chain Sets

Melling timing chain sets are designed for use with either performance or stock cams. They have a solid-bushing chain for a true bearing surface that rolls with the sprockets, eliminating chain stretch. The crank gears are machined from stress-proof steel. Most Melling timing chain sets have three keyways to ensure accurate timing for early or late model vehicles, and to allow you to set the cam timing at 4 degrees advanced, 4 degrees retarded, or stock. However, 50-state (stock replacement) sets have single keyways. The chains are available in several styles, such as single or double roller, single non-roller, and link belt. Melling timing chain sets are not for use above 6,500 rpm. Order the model designed for your vehicle application.

4.22 out of 5 stars ( 133 )

$52.99

$88.99

Belltech Rear Shackle Kits

Belltech rear shackle and hanger kits are designed to lower the rear of your vehicle and maintain an OEM-quality ride. They are constructed from heavy-gauge, die-stamped steel to ensure a perfect fit and superior quality. All shackle kits feature a durable powdercoated finish.

4.7 out of 5 stars ( 176 )

$77.00

$103.00

ACDelco GM Genuine Parts Flexplates

ACDelco GM Genuine Parts flexplates are designed, engineered, and tested to rigorous standards and backed by General Motors. They're true OE parts that will replace your originals with the same fit and performance, and are updated to integrate new materials and technologies. Order the flexplate model recommended for your vehicle.

5.0 out of 5 stars ( 7 )

$93.99

Mahle Original Intake Manifold Gaskets

Common symptoms of poor intake manifold gasket sealing may include leaks, rough idling, and stumbling. For your next engine build, use Mahle Original intake manifold gaskets to seal your engine up tight! It's a known fact—proper sealing is vital to create maximum horsepower within the engine, and these gaskets will allow you to achieve a good, positive seal. They utilize premium materials and are precisely designed to match OE quality, fit, form, and function. Order the intake manifold gasket designed for fitment on your particular vehicle by Mahle Original, one of the most trusted names in professional sealing solutions for engines and exhaust.

4.38 out of 5 stars ( 99 )

$53.99

$106.99

Vision HD 84 D Window Series Black Wheels

Vision HD 84 D Window Series wheels give you the classic combination of strength, light weight, and attitude--at nice prices! Gloss black painted, they are available in several sizes and bolt patterns.

4.31 out of 5 stars ( 145 )

$79.99

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