2003 GMC Sierra 1500 HD Engine Parts

Essential 2003 GMC Sierra 1500 HD Engine Parts

Cloyes Performance – Engine Camshaft Bushing (Part No.P9005)

Engine Camshaft Bushing

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$24.99
Replacement Hex-A-Just Billet Steel Camshaft Dowel Eccentric Bushing; 100% USA Made; Meets or exceeds OEM performance requirements; Cloyes utilizes the latest in design and material technology, ensuring quiet and maintenance-free experience.

Product Features:
  • Replacement Hex-A-Just Billet Steel Camshaft Dowel Eccentric Bushing
  • 100% USA Made
  • Meets or exceeds OEM performance requirements
  • Cloyes utilizes the latest in design and material technology, ensuring quiet and maintenance-free experience.
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Sealed Power – Engine Camshaft Bearing Set (Part No.1888M)

Engine Camshaft Bearing Set

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$31.49
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.

Product Features:
  • Steel-backed Babbitt lining material
  • Used in automotive and high-performance
  • Babbitt is designed to perform under extreme loads w/o damaging other engine parts
  • Babbitt is more environmentally friendly than other material
  • ISO & QS certified manufacturing
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Sealed Power – Engine Valve Spring Retainer Keeper (Part No.VK-291)

Engine Valve Spring Retainer Keeper

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$0.65
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
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Felpro – Upper Oil Pan Gasket Set: PermaDry Molded Rubber, 1 Piece Set (Part No.OS 30693 R)

Upper Oil Pan Gasket Set: PermaDry Molded Rubber, 1 Piece Set

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$66.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • DESIGNED FOR IMPERFECT SEALING SURFACES — Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
  • SUPERIOR SEAL — Manufactured with rubber compounds to ensure a consistent and long-life seal across the entire oil pan
  • PREVENTS OVERTIGHTENING — Torque limiters help eliminate overtightening and gasket splitting and extruding (where applicable)
  • OE-STYLE REPLACEMENT GASKET — Engineered for OE-style molded rubber gasket replacement
  • EVERY PART FOR THE REPAIR — Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
  • ENGINEERING EXPERTISE — Parts are designed, tested, validated and approved by Fel-Pro engineers through rigorous research and development
  • ENGINEERING EXPERTISE — Parts are designed, tested, validated and approved by Fel-Pro engineers through rigorous research and development
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Felpro – Engine Coolant Crossover Pipe Mounting Set (Part No.ES 73027)

Engine Coolant Crossover Pipe Mounting Set

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$19.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design for Unsurpassed quality you can trust
  • Validated for fit, form, and function
  • Quality that you can trust
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
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Dorman – Engine Oil Pan: Direct Fit, Aluminum, Rear Sump, 5 Quart (Part No.264-135)

Engine Oil Pan: Direct Fit, Aluminum, Rear Sump, 5 Quart

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$274.99
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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ACDelco – Oil Filler Cap Gaske (Part No.A6150209855ACD)

Oil Filler Cap Gaske

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$5.22
Oil Filler Cap Gaske

ACDelco – GM Original Equipment Motor Mount (Part No.A7000343694ACD)

GM Original Equipment Motor Mount

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$214.65
The ACDelco GM Original Equipment Motor Mount is a GM-recommended replacement component that provides the same performance, durability, and service life as your factory original equipment.

Product Features:
  • 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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Sealed Power – Engine Push Rod (Part No.RP-3349)

Engine Push Rod

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$6.29
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
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Carquest Premium – 4WD Indicator Light Switch Connector (Part No.PTA1019)

4WD Indicator Light Switch Connector

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$31.49
CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.

Product Features:
  • Premium quality materials for longer service life
  • Sealed connections (where applicable) to prevent environmental corrosion and performance issues
  • Global coverage for import and/or domestic applications
  • OE specified wire gauge to ensure a reliable electrical connection
  • Designed to meet or exceed OE specifications in form, fit and function
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Dorman – Help – Oil Line Block Off Plate Kit (Part No.99971)

Oil Line Block Off Plate Kit

from

$19.99
This engine oil level sensor cover 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 level sensor cover is designed to match the fit and function of the original part on specified vehicles
  • Ideal solution – this cover is a reliable replacement for an original part that is missing or damaged
  • 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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Sealed Power – Engine Valve Lifter (Part No.HT-2148A)

Engine Valve Lifter

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$24.79
Sealed Power® Vintage components provide coverage for applications over 35 years old, restoring classics with like new performance. Leading edge materials, ISO & QS certified manufacturing ensures performance and longevity for treasured engine rebuilds.

Product Features:
  • Unsurpassed quality that you can trust
  • Uses leading edge materials
  • State-of-the-art manufacturing
  • Exacting tolerances
  • Meets or exceeds OEM specifications
  • New OEM riveted pin retaining design
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ACDelco – GM Original Equipment Engine Coolant Temperature Sensor (Part No.C6020409594ACD)

GM Original Equipment Engine Coolant Temperature Sensor

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$62.10
The ACDelco GM Original Equipment Engine Coolant Temperature Sensor monitors the engine temperature, and is a GM-recommended replacement for your vehicle’s original component. The engine temperature signal is used by the engine control module to adjust the air/fuel mixture and ignition timing. This original equipment engine coolant temperature sensor has been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:
  • Undergo the same stringent testing process as the original part
  • 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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MAHLE Original – Camshaft Cover Plate (Part No.B32270)

Camshaft Cover Plate

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$27.99
MAHLE gaskets provide world class sealing products trusted by OEMs & Technicians around the globe.

Product Features:
  • All MAHLE gaskets meet or exceed the original equipment specifications providing the finest sealing products available
  • MAHLE gaskets utilizes OE equivalent or better materials in all our gaskets
  • MAHLE gaskets is the leader in Domestic, Asian and European applications
  • The contents of MAHLE gaskets are packaged in shrink wrapped tray, giving you the added security of knowing that you have the right parts, prior to opening the package
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GM Genuine Parts – Gen III/IV Lifter Guide (Part No.12595365)

Gen III/IV Lifter Guide

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$14.99
GM Genuine Parts Engine Valve Lifter Guide 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:
  • 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
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Melling Select Performnce – High Performance High Volume Cast Aluminum Oil Pump (Part No.10296)

High Performance High Volume Cast Aluminum Oil Pump

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$287.99
Melling high performance oil pumps provide dependable performance every time in every application under the toughest RPM conditions. The Melling 10296 high performance oil pump is a 18% high volume upgrade of the M296. The cast aluminum housing is CNC mac

Product Features:
  • 10% Higher pressure high performance upgrade over M295
  • 18% higher volume high performance upgrade over M295 and 10295
  • Die cast aluminum housing
  • Cast iron cover
  • Standard replacement steel rotors
  • Adjustable pressure relief valve
  • Includes original stock replacement pressure spring; not installed
  • Uses 7/8 inch diameter bolt on screen
  • Includes oil pump and oil pump screen mounting o-ring seals
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Premium Drive Train – Engine Assembly (Part No.L6001GMC)

Engine Assembly

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$3759.99
(PDT) Premium Drivetrain Engines are remanufactured to original equipment (OEM) demanding specifications by an OEM builder. Each engine assembly is manufactured with the highest technology equipment, the most intelligent engineering support, and the best practices available in remanufacturing today.

Product Features:
  • REMANUFACTURING and QUALITY CHECKS – ENGINE BLOCKS: Each block is magnafluxed for cracks and checked for any visible damage to the block or threaded holes before being repainted to the original color. Five CNC machining centers are programmed to precise specifications that meet or exceed those established by the OEM for each engine block. After the engine block is bored, decked, and chamfered, each cylinder is honed with the specified OEM cross-hatch pattern. 100% gauging of all cylinder bores for diameter and roundness after final honing operation. 100% new pistons, rings and bearings are installed in every engine.
  • CYLINDER HEADS: Every head is resurfaced and completely inspected for any visible damage or cracks to the casting or threaded holes. Any heads that have cracks in the combustion chamber are immediately scrapped, no weld repairs. Valve seats are machined, inspected and replaced if necessary. Valve guides are inspected with an air gauge and replaced if necessary. The cam bore is air gauge checked on overhead cam engines and machined if required. 100% new valves, seals and lifters are used in every head. All head and valve assemblies are quantified for leakage using a vacuum decay process.
  • CONNECTING RODS: Each connecting rod is measured against OEM specifications for bend, twist, and center-to-center length before use. The piston pin bore and bearing bore are measured with air gauges for proper dimensions. New torque to yield rod bolts and nuts are installed.
  • CRANKSHAFTS: Crankshafts are machined on a fully automated CNC crank grinder. This enables consistency and critical tolerances for each journal. All oil galley holes are chamfered and brushed after machining and the crankshaft is given a final wash to ensure cleanliness. Each crank is inspected for cracks, bow and all applicable run-out specs for rod and main journals.
  • 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. All engine assemblies quantified for oil gallery, gasket, and casting leakage in the oil passageways.
  • Product might not be available in all states due to local laws.
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ACDelco – 2-Way Female Black Multi-Purpose Pigtail (Part No.PT118)

2-Way Female Black Multi-Purpose Pigtail

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$30.99
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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ACDelco – GM Original Equipment Engine Hydraulic Cam Follower (Part No.A4010352802ACD)

GM Original Equipment Engine Hydraulic Cam Follower

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$62.94
The ACDelco GM Original Equipment Engine Hydraulic Valve Adjuster/Valve Lifter is a GM-recommended replacement for your vehicle’s original component. It automatically maintains a Zero valve lash condition, preventing valve train noise and unnecessary valve train component wear. This original equipment engine hydraulic valve adjuster/valve lifter has been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors. Stay with the brand of parts your General Motors vehicle came with and get peace of mind that the fit, form, and function is up to the high standards and specifications of General Motors. This is important on these types of high-labor-hour repairs because the part designs are enhanced to incorporate GM OE updates, upgrades, and Technical Service Bulletins. Only ACDelco can offer complete late-model coverage and all ACDelco GM OE Engine Components.

Product Features:
  • Adjusts the valves on your vehicle’s engine for proper performance
  • 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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Dorman – Oil Cooler Hose (Part No.A6200719659DOR)

Oil Cooler Hose

from

$157.30
Oil Cooler Hose

Sealed Power – Engine Piston (Part No.WH857CP)

Engine Piston

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$39.49
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.

Product Features:
  • Hypereutectic
  • Made w/exclusive FM425 material for excellent strength & scuff resistance – allows tighter bore and improves sealing for less blow-by
  • State-of-the-art manufacturing
  • Exacting tolerances
  • Meets or exceeds OEM specifications
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Dorman – Timing Cover Kit (Part No.635-522)

Timing Cover Kit

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$102.99
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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ACDelco – GM Original Equipment Fuel Pump Tank Seal (Part No.E3004295098ACD)

GM Original Equipment Fuel Pump Tank Seal

from

$22.52
The ACDelco GM Original Equipment Fuel Pump Tank Seal is a GM-recommended replacement component that provides the same performance, durability, and service life as your factory original equipment.

Product Features:
  • 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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Sealed Power – Engine Piston Ring Set (Part No.E-979K 20)

Engine Piston Ring Set

from

$201.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.

Product Features:
  • Face of top rings coated with latest generation Plasma-Moly
  • Decreases friction
  • Very resistant to scuffing
  • Exacting tolerances
  • Meets or exceeds OEM specifications
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National – Shaft Repair Sleeve (Part No.99193)

Shaft Repair Sleeve

from

$43.99
National® has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.

Product Features:
  • Designed to repair damaged, grooved or worn shafts
  • Durable stainless steel construction for corrosion-free sealing surface that surpasses most original shaft specifications
  • Ideal for a shaft where indications of seal wear, such as tracks or grooves have developed
  • Ultra-thin construction (0.01/0.25mm wall thickness) allows original seal size to be used with minimal additional lip loading
  • Easy to install with removable flange and installation tool
  • Installation tool reduces sleeve distortion and allows for installation without removal from the shaft
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Dorman – Help – Coolant Bypass Seals (Part No.56390)

Coolant Bypass Seals

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$9.99
This engine coolant water bypass gasket is designed to match the fit and function of the original gasket on specified vehicles, and is engineered for durability and reliable performance.

Product Features:
  • Direct replacement – this engine coolant water bypass gasket is designed to match the fit and function of the original gasket on specified vehicles
  • Restores functionality – this gasket is made to fit and fully restore functionality after the original part fails
  • 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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ACDelco – GM Original Equipment Engine Oil Filler Cap (Part No.A6140205158ACD)

GM Original Equipment Engine Oil Filler Cap

from

$17.85
The ACDelco GM Original Equipment Engine Oil Filler Cap seals the oil filler opening on your vehicle’s engine, and is a GM-recommended replacement for your vehicle’s original component. It has a rubber sealing ring that keeps the engine oil and crankcase vapors in, while keeping water and dirt out. This original equipment engine oil filler cap has been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:
  • Seals and helps keep oil from leaking out of your engine oil filler opening
  • 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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Dorman – Help – Engine Oil Fill Cap (Part No.80987)

Engine Oil Fill Cap

from

$13.99
This engine oil filter cap is designed to match the fit and function of the original cap on specified vehicles, and is engineered for durability and reliable performance.

Product Features:
  • Direct replacement – this engine oil filter cap is designed to match the fit and function of the original cap on specified vehicles
  • Restores functionality – reliable replacement for an original part that is missing or cracked due to heat and 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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Popular 2003 GMC Sierra 1500 HD Engine Parts Categories

2003 GMC Sierra 1500 HD Engine Parts

You count on your 2003 GMC Sierra 1500 HD to run right. That means taking care of it with regular maintenance, necessary repairs, and the right parts. Advance Auto Parts can help with all of that thanks to our extensive inventory of trusted Engine Parts. With 202 Engine Parts ranging in price from $0.65 to $4,863.99, you’re sure to find everything you need for your 2003 GMC Sierra 1500 HD.

Brands matter. If you want to shop a specific Engine Parts brand, we stock 23 different brands like Felpro, Sealed Power, and Dorman. 2003 GMC Sierra 1500 HD Engine Parts start as low as $0.65!

One of the best ways to find top quality OEM or aftermarket Engine Parts is by asking professionals. Short of that, you can shop with confidence thanks to our 1,108 extensive product reviews on 2003 GMC Sierra 1500 HD Engine Parts. Some of the top-rated Engine Parts products we carry are Multi-Purpose O-Ring with 4.9 stars and Stock Replacement OE Type Oil Pump with 4.5 stars.

Did we mention you can order your Engine Parts from our online catalog and have them shipped right to your garage? Or, if you feel like seeing the parts first-hand, search for your nearest Advance Auto Parts location above and pick up in-store when you’re ready. Browse our full Engine Parts inventory for your 2003 GMC Sierra 1500 HD below to get started!

Top-Rated Engine Parts Brands For Your 2003 GMC Sierra 1500 HD

Trusted Engine Parts OEM and aftermarket product brands are what Advance Auto Parts specializes in. The brands we work with are sure to keep that 2003 GMC Sierra 1500 HD running right for years to come. In our inventory you’ll find brands like Felpro, Sealed Power, Dorman, and even more.

Popular National Engine Parts

You’ll find popular National brand products across Engine Internals and Engine Gaskets and Seals. All are waiting to get your 2003 GMC Sierra 1500 HD back on the road. Some of the top-rated National products in these categories are:
Multi Purpose Seal
from $28.99
(7)
Multi Purpose Seal
Crankshaft Seals
Shaft Repair Sleeve
from $43.99
(2)
Shaft Repair Sleeve
Power Take Off Shaft Seal
Multi Purpose Seal
from $25.99
(7)
Multi Purpose Seal
Rear Main Seal Sets

FAQs for 2003 GMC Sierra 1500 HD Engine Parts

What are the most purchased Engine Parts for the 2003 GMC Sierra 1500 HD?

Out of 202 Engine Parts for the 2003 GMC Sierra 1500 HD, the most popular in our inventory are:
Engine Valve Lifter
from $12.99
(30)
Engine Valve Lifter
Engine Valve Lifters
Engine Crankshaft Seal Kit
from $41.99
(31)
Engine Crankshaft Seal Kit
Rear Main Seal Sets
Rear Main Seal Cover Kit
from $74.99
(19)
Rear Main Seal Cover Kit
Rear Main Seal Sets

What are the top-rated 2003 GMC Sierra 1500 HD Engine Parts?

Top-rated Engine Parts for your 2003 GMC Sierra 1500 HD based on customer reviews/ratings are:
Multi-Purpose O-Ring
from $5.49
(41)
Multi-Purpose O-Ring
“Fixed the low oil pressure at idle and ticking from the lifters”
Stock Replacement OE Type Oil Pump
from $121.99
(26)
Stock Replacement OE Type Oil Pump
“Great service.good job”
Engine Oil Filler Cap: 10099, Twist-Lock, Direct Fit, Provides Tight Seal, 1 Pack
from $9.99
(22)
Engine Oil Filler Cap: 10099, Twist-Lock, Direct Fit, Provides Tight Seal, 1 Pack
“Fit my 2006 Chevy Cobalt perfectly and for the cheap price it couldn’t be a better deal. I highly reccommend it. Also the AAP guy who sold it to me ma”