2003 Workhorse P-Series Engine
Select Your Submodel
- Engine Assemblies
- Engine Blocks
- Valves & Valvetrain Parts
- Pistons, Rings & Connecting Rods
- Oil Filters
- Serpentine Belts & Auxiliary Drive Belts
- Valve Covers
- Timing Gears, Chains & Covers
- Oil Pans, Drain Plugs & Dipsticks
- Cylinder Heads
- Engine Pulleys
- Engine Sensors, Relays, Switches
- Oil Pumps
- Oil Coolers
- Camshafts
- Crankshafts
- Engine Management Systems
- Engine Bearings
- Harmonic Balancers
- Engine Rebuild Kits
- Balance Shafts
- Throttle Bodies
- Carburetors
- Motor Oils
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Dorman®TECHoice™ Idler PulleyWorkhorse P-Series 2003, TECHoice™ Idler Pulley by Dorman®. This replacement accessory drive belt idler pulley has been engineered to match the function and performance of the original pulley on select vehicle years, makes and models,...Direct replacement - this accessory drive belt idler pulley matches the fit and function of the original equipment pulley on specified vehiclesRestores performance - fixes a failed, squealing or groaning noise from a worn idler pulley$13.87 - $14.01 - Continental® ContiTech™Elite™ Drive Belt Tensioner AssemblyWorkhorse P-Series 8.1L 2003, Elite™ Drive Belt Tensioner Assembly by Continental® ContiTech™. This belt tensioner assembly is constructed to meet OE requirements for fit, form, and function. It provides smooth, noiseless, and...Constructed to match OE form, fit, and functionMaintains its correct alignment to the belt and correct accessory belt tension$39.07 - $82.85
- SKP®Drive Belt Idler PulleyWorkhorse P-Series 2003, Drive Belt Idler Pulley by SKP®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$5.82 - $7.13
- SKP®Drive Belt TensionerWorkhorse P-Series 2003, Drive Belt Tensioner by SKP®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$23.34 - $42.77
- Dorman®OE Solutions™ Valve Cover KitWorkhorse P-Series 2003, OE Solutions™ Valve Cover Kit by Dorman®. Save time and money with the Dorman Engine Valve Cover. The engine valve cover is designed to protect the cylinder head, and its components, along with sealing oil...Direct replacement - this valve cover matches the original equipment part for fit and functionDurable construction - this valve cover is made of quality materials to withstand extreme temperatures to resist leaking$71.34 - $114.16
- SKP®Driver Side Valve CoverWorkhorse P-Series 6.0L 2003, Driver Side Valve Cover by SKP®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs...Precise engineering ensures second to none quality and lasting valueStringently tested with the highest quality standards$62.44
- PAI®Rear Crankshaft SealWorkhorse P-Series 3.9L 2003, Rear Crankshaft Seal by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$25.40 - $54.02
- PAI®Rear Crankshaft SealWorkhorse P-Series 3.9L 2003, Rear Crankshaft Seal by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$25.40 - $54.02
- Dorman®OE Solutions™ Camshaft Position SensorWorkhorse P-Series 2003, OE Solutions™ Camshaft Position Sensor by Dorman®. This direct replacement camshaft position sensor matches the fit and performance of a failed original equipment sensor to restore proper engine starting and...Direct replacement - this camshaft position sensor matches the fit and performance of the original equipment sensorDurable construction - this part is manufactured to exacting standards to ensure reliable performance and durability$25.02 - $33.82
- Dorman®OE Solutions™ Crankshaft Position SensorWorkhorse P-Series 2003, OE Solutions™ Crankshaft Position Sensor by Dorman®. This direct replacement crankshaft position sensor matches the fit and function of the original equipment sensor for a reliable repair. This part has...Direct replacement - this crankshaft position sensor is a precise match for the fit and function of the original equipment sensorReady to install - matches the factory-style connector for plug-and-play installation$30.24 - $45.20
- Dorman®OE Solutions™ Passenger Side Inner Regular Grade Type Harmonic Balancer Assembly KitWorkhorse P-Series 5.7L 2003, OE Solutions™ Passenger Side Inner Regular Grade Type Harmonic Balancer Assembly Kit by Dorman®. Durable and sleek, Dorman Harmonic Balancers feature a stress-resistant rubber bond that withstands the...Direct replacement to ensure proper fitBenchmarked against OE performance to meet strict quality standards$68.24
- Dura-Bond®High Performance Camshaft Bearing Set with 3 HoleWorkhorse P-Series 5.7L 2003, High Performance Camshaft Bearing Set with 3 Hole by Dura-Bond®. Coated. OD Grove with 3 Hole, 120 Degree Spacing. The high performance all-round cam bearings offer more than double the fatigue strength of...Rigorously tested to withstand years of abuseHigh-grade materials for long-lasting durability$148.94
- Melling®Oil PumpWorkhorse P-Series 2003, Oil Pump by Melling®. Designed utilizing the latest technology, this Engine Oil Pump by Melling features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$163.70 - $266.11
- SKP®Camshaft Position SensorWorkhorse P-Series 6.0L 2003, Camshaft Position Sensor by SKP®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$15.62
- SKP®Crankshaft Position SensorWorkhorse P-Series 2003, Crankshaft Position Sensor by SKP®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$12.06 - $17.28
- SKP®Serpentine Belt Anti-Slip ShieldWorkhorse P-Series 2003, Serpentine Belt Anti-Slip Shield by SKP®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$8.97 - $9.54
- Dorman®Autograde™ Oil Drain Plug GasketWorkhorse P-Series 5.7L / 6.0L / 6.5L / 8.1L 2003, Autograde™ Oil Drain Plug Gasket by Dorman®. Dorman's Engine Oil Drain Plug Gaskets are conveniently available in packs of varying quantities. Many styles are offered, including...Direct replacement gaskets and some universal gaskets available. Proper fit with the drain plug ensures a tight sealGaskets are also included with many of Dorman's Engine Oil Drain Plugs and Pans$1.58 - $12.55
- Dorman®HELP™ Oil-Tite Carded Oil Adapter And Cooler Gasket AssortmentWorkhorse P-Series 5.7L 2003, HELP™ Oil-Tite Carded Oil Adapter And Cooler Gasket Assortment by Dorman®. This engine oil filter adapter O-ring is designed to match the fit and function of the original O-ring on specified vehicles, and...Direct replacement - this engine oil filter adapter O-ring is designed to match the fit and function of the original O-ring on specified vehiclesRestores functionality - this O-ring is made to fit and fully restore part functionality after the original O-ring fails$3.66
- Dorman®HELP™ Oil Filler CapWorkhorse P-Series 8.1L 2003, HELP™ Oil Filler Cap by Dorman®. Dorman's Engine Oil Filler Cap is constructed of durable rubber to provide a tight, heat-resistant seal for the valve cover. It effectively prevents debris from entering...Replacement prevents debris and moisture from entering the Oil Fill Tube and contaminating the oil systemClearly marked with raised letters for quick identification under the hood$8.70 - $9.52
- Dorman®OE Solutions™ Oil Cooler Line ConnectorWorkhorse P-Series 2003, OE Solutions™ Oil Cooler Line Connector by Dorman®. Dorman's Oil Cooler Line Connectors provide a tight fit between transmission lines or between the transmission and the radiator. Installation is quick...Save time, money and labor by replacing only the Connector, not the entire Oil Cooler LineDurable steel or brass construction ensures a long service life$9.00 - $15.73
- Dorman HD Solutions®Oil Cooler Line ConnectorWorkhorse P-Series 8.1L 2003, Oil Cooler Line Connector by Dorman HD Solutions®. Designed utilizing the latest technology, this product by Dorman features premium quality and will perform better than advertised. Perfect for your vehicle...Made with precision and quality in mindDesigned to meet your specific needs$21.95
- PAI®Hydraulic Pump Cover GasketsWorkhorse P-Series 3.9L 2003, Hydraulic Pump Cover Gaskets by PAI®. 5 Pieces. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of...2 Years WarrantyPerfect blend of leading innovations and superior workmanship$2.96
- PAI®Oil Pickup Tube GasketWorkhorse P-Series 3.9L 2003, Oil Pickup Tube Gasket by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$1.13
- Dorman®Autograde™ Expansion PlugsWorkhorse P-Series 2003, Autograde™ Expansion Plugs by Dorman®. This engine expansion 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...Direct replacement - this engine expansion plug matches the fit and function of the factory part on specified years, makes and modelsIdeal solution - this plug is a reliable replacement for an original part that is missing or has failed due to fatigue$6.25 - $12.88
- Dorman®Autograde™ Front 1-5/8" Steel Cup Expansion PlugWorkhorse P42 2003, Autograde™ Front 1-5/8" Steel Cup Expansion Plug by Dorman®. This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is...Direct replacement - this engine expansion plug matches the fit and function of the factory part on specified years, makes and modelsIdeal solution - this plug is a reliable replacement for an original part that is missing or has failed due to fatigue$1.57
- Dorman®OE Solutions™ Steel Harmonic Balancer BoltWorkhorse P42 2003, OE Solutions™ Steel Harmonic Balancer Bolt by Dorman®. This engine harmonic balancer bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is...Direct replacement - this engine harmonic balancer bolt matches the fit and function of the factory part on specified years, makes and modelsIdeal solution - this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue$4.81
- Dorman®TECHoice™ 3 Way Female Oil Pressure Switch ConnectorWorkhorse P-Series 5.7L 2003, TECHoice™ 3 Way Female Oil Pressure Switch Connector by Dorman®. Make better electrical repairs and accessory installations with this pigtail connector. Designed for a clean appearance when installed, it...Professional appearance - this electrical pigtail is designed for a clean, professional look when installedConvenient solution - this pigtail connector allows the circuit to be quickly disconnected for service or occasional use$18.14
- Idemitsu®SAE 0W-16 Full Synthetic Motor Oil, 5 QuartsSAE 0W-16 Full Synthetic Motor Oil, 5 Quarts by Idemitsu®. Idemitsu 0W-16 SP/GF-6B is a fully synthetic, ultra-low viscosity formulation with robust additive technology, enabling engines to achieve maximum levels of efficiency, torque...$37.65
- Dorman®OE Solutions™ Throttle Body Position SensorWorkhorse P42 2003, OE Solutions™ Throttle Body Position Sensor by Dorman®. This throttle position sensor is designed to match the fit and function of the original sensor on specified vehicles, and is engineered for durability and...Direct replacement - this throttle position sensor is designed to match the fit and function of the original sensor on specified vehiclesIdeal solution - this sensor is a reliable replacement for an original part that has failed due to fatigue or electrical malfunction$24.64
