2003 Cadillac DeVille Engine Cooling Parts

Keep Your 2003 Cadillac DeVille in Top Shape with Quality Engine Cooling Parts

Whether you’re repairing or upgrading your Engine Cooling Part, using high-quality parts is key to keeping your 2003 Cadillac DeVille looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Coolant Reservoir Caps, Thermostat and Water Outlet Assemblies, and Radiators. 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 Engine Cooling Parts from Trusted Brands

Looking for a reliable Engine Cooling Part? We’ve got you covered with options from brands you know and trust like Carquest Premium, FELPRO, and Dorman. For example, Carquest Premium Engine Cooling Parts start at just $6.79 with an average 4.4 star rating. FELPRO and Dorman offer similar pricing and quality, backed by strong customer feedback. With over 1,107 reviews and a solid 4 star average, you can shop with confidence knowing other Cadillac DeVille owners approve.

Competitive Prices and Extensive Inventory

The average price for a 2003 Cadillac DeVille Engine Cooling Part at Advance Auto Parts is around $62.26, with a range that starts at $3.99 and goes up to $273.99. With 39 options in stock from 10 trusted brands, finding the right fit is easy. Popular picks like Coolant Temp Sensor Switch, Coolant Temperature Sensor, and Adjustable Thermostatic Fan Control start at just $23.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Engine Cooling Part, don’t forget to check out other key components like Blower Motor and Related Products and HVAC Electrical Parts. At Advance Auto Parts, we’re here to help you keep your 2003 Cadillac DeVille in peak condition, inside and out.

Essential 2003 Cadillac DeVille Engine Cooling Parts

Carquest Premium – Radiator Cap: 18 PSI (Part No.10234)

Radiator Cap: 18 PSI

from

$6.79
Crafted to meet the exact specifications set by Original Equipment Manufacturers (OEM), these products are engineered for effortless installation and removal. Constructed from premium-grade components, incorporating proper relief and vacuum valves, they ensure optimal performance even in the most demanding automotive cooling systems. Rigorously quality-tested, these components provide exceptional, out-of-the-box performance and superior durability to meet or exceed the highest standards of today’s vehicles.

Product Features:
  • Maintains proper cooling system pressure
  • Easy installation and removal
  • 100% tested to ensure proper pressure and longevity
  • Meets all OEM specifications
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Dorman – Pressurized Coolant Reservoir: Black and White, Plastic, Original Equipment Replacement (Part No.603-122)

Pressurized Coolant Reservoir: Black and White, Plastic, Original Equipment Replacement

from

$145.99
This replacement engine coolant reservoir is manufactured from quality materials to withstand the stresses of underhood heat and engine vibration. It is engineered and manufactured to match the fit and function of the original part.

Product Features:
  • Direct replacement – this engine coolant reservoir matches the fit and function of the original part
  • Ideal solution – engineered for a seamless installation
  • Durable construction – manufactured from quality materials to withstand underhood heat and vibration
  • Trustworthy design – backed by 100 years of automotive aftermarket experience
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Mr. Gasket – Water Neck (Part No.2557)

Water Neck

from

$31.99
Precision die cast, these water necks are first polished to a high luster, then chrome plated. Features an O-ring style seal to prevent water leaks. Comes with O-ring gasket and mounting bolts.

Product Features:
  • Complete with o-rings and mounting bolts
  • Features an o-ring style seal to prevent water leaks
  • Chrome plated
  • 1/2″ NPT port can be used for various coolant temp related sensors or switches
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Carquest Premium – Radiator Cap Tester Adapter (Part No.12552)

Radiator Cap Tester Adapter

from

$14.99
Tester adapter for the MT-300 cooling system pressure testers. Professional grade test equipment to ensure an automotive cooling system is operating at the correct pressure. Made from high quality materials to ensure durability. Designed to test automotive coolant caps.

Product Features:
  • Machined metal construction
  • Works with MT-300 pressure tester
  • Tests coolant caps
  • Professional quality
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Carquest Premium – Engine Water Pump: New, Gasket/Seals Included (Part No.T4109)

Engine Water Pump: New, Gasket/Seals Included

from

$52.99
Carquest Premium water pumps are 100% new, high-quality parts that meet or exceed original equipment (O.E.) specifications. All components, including the housing, hub, bearings, gaskets and seals are designed for long-lasting service life. These water pumps are supplied with the gaskets or seals necessary for installation. Our Carquest Premium water pumps undergo stringent testing to ensure superior performance that we stand behind with an industry-leading warranty.

Product Features:
  • 100% tested for reliable performance
  • Durable housing features precisely machined mounting surface for proper sealing and fitment
  • Equipped with weep chamber or similar feature to help prevent unnecessary replacement
  • Included heavy-duty unitized bearings, pressed-on hubs and optimal impeller clearance for a long-lasting water pump
  • All gaskets or seals necessary for water pump are included
  • This pump is driven by the accessory belt and we recommend replacement if nearing service recommendation
  • This pump is driven by the timing chain; see vehicle manufacturer recommendation for replacement of timing components
  • This pump is driven by the timing belt; see vehicle manufacturer recommendation for replacement of timing components
See More

Felpro – Engine Water Pump Installation Kit (Part No.ES 72758)

Engine Water Pump Installation Kit

from

$44.99
Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design
  • Manufactured for the sealing repair environment
  • Validated for fit, form, and function
  • Quality that you can trust
See More

KAI – Radiator Support Tie Bar (Part No.GM1225205)

Radiator Support Tie Bar

from

$35.99
New Standard Replacement Radiator Support Upper Tie Bar

Product Features:
  • Made Of Steel
  • Meets All Federal Motor Safety Standards
  • No Drilling Needed For Installation
  • No Modifications Needed For Installation
  • Direct Fit Replacement For Your Vehicle
  • Same Form Fit And Function As OE
  • Check Out The Large Selection Of Parts Available For Your Vehicle
See More

Motorad – Engine Coolant Thermostat Housing Assembly Thermostat: With Gasket, 195 Degrees (Part No.4841KT)

Engine Coolant Thermostat Housing Assembly Thermostat: With Gasket, 195 Degrees

from

$31.99
Kit includes thermostat, housing, and all necessary seals/gaskets to do the complete job. These individual parts are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat and housing will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:
  • High grade stainless steel and copper construction
  • Meets or exceeds OEM standards
  • Consistent and precise response to cooling system needs
  • Original equipment design for worry-free direct fit replacement
  • 100% tested and calibrated
See More

Felpro – Engine Water Pump Gasket (Part No.35987)

Engine Water Pump Gasket

from

$5.99
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design
  • Manufactured for the sealing repair environment
  • Validated for fit, form, and function
  • Quality that you can trust
See More

Carquest Premium – Coolant Housing/Water Outlet (Part No.85284)

Coolant Housing/Water Outlet

from

$22.99
We are proud to offer this Carquest product line: Carquest Water Outlets. Our products are engineered and tested to provide years of trouble free operation and designed to be hassle free OE replacement part that meets and/or exceeds OE standards. Backed by over 50 years of mobile temperature control experience, fix it once and fix it right with CARQUST Water Outlets and Thermostat Housings.

Product Features:
  • Meets and/or exceeds OEM standard
  • Direct-fit replacement for ease of installation
  • Coated with corrosion and rust inhibitor
  • 100% leak tested
  • Meets and/or exceeds OEM standard
  • Coated with corrosion and rust inhibitor
  • 100% leak tested
  • Direct-fit replacement for ease of installation
See More

Dorman – GM Radiator Core Support Retainer (Part No.963-408D)

GM Radiator Core Support Retainer

from

$4.99
Constructed of quality materials, this multi-purpose retainer provides the same function and versatility as the original equipment retainer ensuring long service life.

Product Features:
  • Ideal replacement – this retainer matches the fit and function of the original equipment retainer for this vehicle application
  • Quality material – this retainer is made of durable material for long-lasting service
  • Versatile design – this retainer is suitable for a variety of automotive uses
  • Excellent value – this part offers original equipment quality at a competitive cost
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Felpro – WATER PUMP GASKET SET (Part No.35794)

WATER PUMP GASKET SET

from

$6.79
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
  • Manufactured for the sealing repair environment
  • Validated for fit, form, and function
  • Quality that you can trust
See More

Carquest Premium – Reservoir Cap (Part No.T174)

Reservoir Cap

from

$57.99
Crafted to meet the exact specifications set by Original Equipment Manufacturers (OEM), these products are engineered for effortless installation and removal. Constructed from premium-grade components, incorporating proper relief and vacuum valves, they ensure optimal performance even in the most demanding automotive cooling systems. Rigorously quality-tested, these components provide exceptional, out-of-the-box performance and superior durability to meet or exceed the highest standards of today’s vehicles.

Product Features:
  • Maintains proper cooling system pressure
  • Easy installation and removal
  • 100% tested to ensure proper pressure and longevity
  • Meets all OEM specifications
See More

Imperial – Electric Fan, 16" Diameter (Part No.226116)

Electric Fan, 16" Diameter

from

$92.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:
  • Rapid-Cool Thin-Line electric fans
  • 16″ diameter
  • 1,400 CFM
  • Use as a pusher or puller fan
  • Motors built and tested to quality specifications
  • 16 in. universal fit reversible fan
  • 1400 CFM
  • UNIVERSAL fan, NOT a direct OE replacement. Measure core and verify space.
See More

KAI – Radiator (Part No.RAD2491)

Radiator

from

$144.99
New Platinum Pro Radiator, V8, Without Engine Oil Cooler

Product Features:
  • V8, Without Engine Oil Cooler, Made Of Plastic and Aluminum
  • Meets All Federal Motor Safety Standards
  • No Drilling Needed For Installation
  • No Modifications Needed For Installation
  • Direct Fit Replacement For Your Vehicle
  • Same Form Fit And Function As OE
  • Radiator Cap Not Included
  • Check Out The Large Selection Of Parts Available For Your Vehicle
See More

Dorman – Engine Water Pump Pulley (Part No.300-940)

Engine Water Pump Pulley

from

$76.99
Damaged your engine water pump pulley? This pulley is a direct replacement for the original manufacturer’s part on specific vehicle years, makes and models, restoring proper performance.

Product Features:
  • Direct replacement – this engine water pump pulley matches the fit and function of the original part on specific vehicles
  • Durable design – built to withstand the elements and road debris
  • Thoroughly tested – must pass strict standards to ensure reliable longevity
  • Trustworthy quality – backed by team of engineers and inspectors in United States
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Felpro – Engine Water Pump Gasket (Part No.35388)

Engine Water Pump Gasket

from

$4.49
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Manufactured for the sealing repair environment
  • Validated for fit, form, and function
  • Unsurpassed quality you can trust
See More

Dorman – Radiator Fan Motor Connector (Part No.645-176)

Radiator Fan Motor Connector

from

$44.99
This engine cooling fan motor connector is designed to match the appearance and function of the original hardware on specified applications. Made of quality materials, it is engineered for reliable performance and durability.

Product Features:
  • Direct replacement – this engine cooling fan motor connector matches the appearance and function of the factory hardware on specified applications
  • Ideal solution – this connector 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
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Imperial – Thermostatic Fan Control – Adjustable (Part No.226208)

Thermostatic Fan Control - Adjustable

from

$69.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:
  • Adjustable thermostatic fan control
  • 160 Deg. F – 210 Deg. F thread-in probe
  • For use with Imperial electric fans
  • Thread-in probe for installation in water jacket or radiator
  • Contains gaskets, O-rings, or seals to properly replace the product
  • Brass construction for accurate temperature sensing
  • Zinc coated terminal to resist corrosion
  • Vehicle specific applications
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Imperial – Adjustable Thermostatic Fan Control (Part No.226203)

Adjustable Thermostatic Fan Control

from

$23.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:
  • Economy adjustable thermostatic fan control
  • Economy Model; 32-248 Deg. F
  • For use with Imperial electric fans
  • Probe installs into radiator fins
  • Contains gaskets, O-rings, or seals to properly replace the product
  • Brass construction for accurate temperature sensing
  • Zinc coated terminal to resist corrosion
  • Vehicle specific applications
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Felpro – Multi-Purpose O-Ring (Part No.35346)

Multi-Purpose O-Ring

from

$6.29
Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design
  • Manufactured for the sealing repair environment
  • Validated for fit, form, and function
  • Quality that you can trust
See More

Carquest Premium – Coolant Temperature Sensor (Part No.WTC1172)

Coolant Temperature Sensor

from

$15.99
Carquest Premium coolant temperature sensors and switches are designed to perform in harsh engine environments and meet or exceed original equipment (O.E.) specifications. Built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry, Carquest Premium coolant temperature sensors and switches undergo extensive validation testing to ensure long-lasting performance and reliability. Carquest Premium coolant temperature sensors and switches are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.

Product Features:
  • Designed to meet or exceed OE specifications for fit, form and function
  • 100% factory resistance calibrated to ensure precision tolerances, resulting in extremely accurate temperature for optimal performance
  • OE precision matched thermistor ensuring sensors match OE output resistances across all temperature positions
  • O-rings, seals or thread sealant are included if required
  • Weather-tight connectors prevent leaks and corrosion for longer life
  • Extensive design validation testing and 100% end-of-line tested
  • Carquest Vehicle Solutions Technical Support available from ASE certified technicians: 1-866-687-5413
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Carquest Premium – Engine Coolant Temperature Switch (Part No.WTA1105)

Engine Coolant Temperature Switch

from

$19.99
Carquest Premium Vehicle Solutions provides high-quality solutions for a wide range of applications. The Engine Coolant Temperature Sensor/Switch accurately monitors the engine’s temperature, enabling timely adjustments to the cooling system and preventing overheating, which enhances engine performance and longevity. Engineered for maximum performance and durability, our products are built to excel in even the most demanding conditions, ensuring reliable operation and long-lasting value.

Product Features:
  • Durable Construction: Designed with high-quality materials to withstand harsh environmental conditions, ensuring long-lasting performance in extreme temperatures, vibrations, and moisture exposure.
  • Precision Engineering: Accurate sensing and switching capabilities provide reliable performance, reducing the risk of malfunctions and improving vehicle safety and efficiency.
  • Easy Installation & Maintenance: Designed for quick installation and minimal upkeep, reducing downtime and repair costs for both manufacturers and consumers.
  • Fit/Form/Function: Each vehicle electronic component is engineered to meet or surpass OEM standards, ensuring precise fit, optimal functionality, and reliable performance.
See More

Imperial – Electric Fan, 16" (Part No.226216)

Electric Fan, 16"

from

$115.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:
  • Thin-line electric fan
  • 16″ diameter
  • 1,400 CFM
  • Use as a pusher or puller fan
  • Motors built and tested to quality specifications
  • 16 in. universal fit reversible fan
  • 1500 CFM
  • UNIVERSAL fan, NOT a direct OE replacement. Measure core and verify space.
See More

Imperial – Electric Fan, 10" Diameter (Part No.226110)

Electric Fan, 10" Diameter

from

$72.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:
  • Rapid-Cool Thin-Line electric fans
  • 10″ Diameter
  • 650 CFM
  • Use as a pusher or puller fan
  • Motors built and tested to quality specifications
  • 10 in. universal fit reversible fan
  • 650 CFM
  • UNIVERSAL fan, NOT a direct OE replacement. Measure core and verify space.
See More

Carquest Premium – Standard Thermostat: 160 Degrees (Part No.13476)

Standard Thermostat: 160 Degrees

from

$10.99
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:
  • High grade stainless steel and copper construction
  • Meets or exceeds OEM standards
  • Consistent and precise response to cooling system needs
  • Original equipment design for worry-free direct fit replacement
  • 100% tested and calibrated
See More

Edelbrock – High Performance Thermostat (53mm) – 160 Deg (Part No.8603)

High Performance Thermostat (53mm) - 160 Deg

from

$24.99
Edelbrock thermostats are designed to ensure consistent cooling in high-performance applications. Feature a brass and copper valve assembly with a stainless steel body for durability. This 160 Deg F thermostat is a bolt-on OEM style replacement that measu

Product Features:
  • 54mm Diameter
  • Rated For 160 Degrees
  • High Flow Type
  • OE Style
  • Made in The USA
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Carquest Premium – Standard Thermostat: 180 Degrees (Part No.13458)

Standard Thermostat: 180 Degrees

from

$7.99
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:
  • High grade stainless steel and copper construction
  • Meets or exceeds OEM standards
  • Consistent and precise response to cooling system needs
  • Original equipment design for worry-free direct fit replacement
  • 100% tested and calibrated
See More

Most Popular Coolant Reservoir Caps for 2003 Cadillac DeVilles

Enhance your 2003 Cadillac DeVille with one of the 2 Coolant Reservoir Caps we have in stock, starting at just $10.49.

Dorman – Help – Engine Coolant Reservoir Cap: Spring Loaded Twist, Plastic, 1 Pack (Part No.54221)

Engine Coolant Reservoir Cap: Spring Loaded Twist, Plastic, 1 Pack

from

$26.99
Cracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.

Product Features:
  • Direct replacement – this engine coolant reservoir cap directly replaces a cracked or lost original cap
  • Application specific – made to match dimensions of reservoir cap on only certain vehicle years, makes and models
  • Seamless fit – reverse-engineered from the original equipment to fit perfectly
  • Excellent value – a quick, easy replacement that’s less expensive than going back to the dealership
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Carquest Premium – Radiator Cap: 18 PSI (Part No.10334)

Radiator Cap: 18 PSI

from

$10.49
Crafted to meet the exact specifications set by Original Equipment Manufacturers (OEM), these products are engineered for effortless installation and removal. Constructed from premium-grade components, incorporating proper relief and vacuum valves, they ensure optimal performance even in the most demanding automotive cooling systems. Rigorously quality-tested, these components provide exceptional, out-of-the-box performance and superior durability to meet or exceed the highest standards of today’s vehicles.

Product Features:
  • Safety lever to vent coolant pressure before removal
  • Maintains proper cooling system pressure
  • Easy installation and removal
  • 100% tested to ensure proper pressure and longevity
  • Meets all OEM specifications
See More

Best-Selling 2003 Cadillac DeVille Thermostat and Water Outlet Assembly

Upgrade your DeVille with our best-selling Thermostat and Water Outlet Assembly.

Motorad – Engine Coolant Thermostat Housing Assembly Thermostat: With Seal, 180 Degrees (Part No.5284KT)

Engine Coolant Thermostat Housing Assembly Thermostat: With Seal, 180 Degrees

from

$36.99
Manufactured with OEM quality materials and safety standards by an OE Supplier. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable

Product Features:
  • High grade stainless steel and copper construction
  • Meets or exceeds OEM standards
  • Consistent and precise response to cooling system needs
  • Original equipment design for worry-free direct fit replacement
  • 100% tested and calibrated
See More

Top-Quality Radiators for 2003 Cadillac DeVilles

Choose a high-quality OEM or aftermarket Radiator for Cadillac DeVilles and enjoy top-notch performance from $144.99.

Carquest Premium – Radiator: With Transmission Oil Cooler (Part No.432394)

Radiator: With Transmission Oil Cooler

from

$243.99
Carquest Premium radiators are designed and engineered for maximum performance, using the highest-grade materials to ensure all radiators meet or exceed original equipment (O.E.) fit, form and function. Carquest Premium radiators are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Most modern vehicles use radiators with plastic tanks and our parts are engineered with integrated ribbing to prevent damage during thermal cycling. Carquest Premium radiators are also 100% tested to ensure a durable, leak-free cooling system repair.

Product Features:
  • Thermal tested under real-life temperature simulations
  • High tensile strength aluminum for maximum crimp strength
  • Plastic tanks are engineered with integrated ribbing for added strength to withstand cracks, bowing and distortion during thermal cycles
  • Thermal expansion slots extend core life and reduce failure rates by allowing improved core expansion and contraction during systematic heat cycles
  • Oil cooler designs meet or exceed OE standards, keeping the vehicle¿s engine and transmission performing at optimal conditions
  • OEM grade, premium fittings for transmission or engine oil coolers (where applicable)
See More

Carquest Premium – Radiator: With Engine And Transmission Oil Coolers (Part No.432414)

Radiator: With Engine And Transmission Oil Coolers

from

$273.99
Carquest Premium radiators are designed and engineered for maximum performance, using the highest-grade materials to ensure all radiators meet or exceed original equipment (O.E.) fit, form and function. Carquest Premium radiators are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Most modern vehicles use radiators with plastic tanks and our parts are engineered with integrated ribbing to prevent damage during thermal cycling. Carquest Premium radiators are also 100% tested to ensure a durable, leak-free cooling system repair.

Product Features:
  • Thermal tested under real-life temperature simulations
  • High tensile strength aluminum for maximum crimp strength
  • Plastic tanks are engineeredáwith integrated ribbingáfor addedástrength to withstand cracks, bowing and distortion during thermal cycles
  • Thermal expansion slots extend core life and reduce failure rates by allowing improved core expansion and contraction during systematic heat cycles
See More

KAI – Radiator (Part No.RAD2491)

Radiator

from

$144.99
New Platinum Pro Radiator, V8, Without Engine Oil Cooler

Product Features:
  • V8, Without Engine Oil Cooler, Made Of Plastic and Aluminum
  • Meets All Federal Motor Safety Standards
  • No Drilling Needed For Installation
  • No Modifications Needed For Installation
  • Direct Fit Replacement For Your Vehicle
  • Same Form Fit And Function As OE
  • Radiator Cap Not Included
  • Check Out The Large Selection Of Parts Available For Your Vehicle
See More

Top Picks for 2003 Cadillac DeVille Water Pumps

Invest in one of our 2 durable Water Pumps for your 2003 Cadillac, knowing you’re getting trusted brands and expert craftsmanship.

Carquest Premium – Engine Water Pump: New, Gasket/Seals Included (Part No.T1163)

Engine Water Pump: New, Gasket/Seals Included

from

$59.99
Carquest Premium water pumps are 100% new, high-quality parts that meet or exceed original equipment (O.E.) specifications. All components, including the housing, hub, bearings, gaskets and seals are designed for long-lasting service life. These water pumps are supplied with the gaskets or seals necessary for installation. Our Carquest Premium water pumps undergo stringent testing to ensure superior performance that we stand behind with an industry-leading warranty.

Product Features:
  • 100% tested for reliable performance
  • Durable housing features precisely machined mounting surface for proper sealing and fitment
  • Equipped with weep chamber or similar feature to help prevent unnecessary replacement
  • Included heavy-duty unitized bearings, pressed-on hubs and optimal impeller clearance for a long-lasting water pump
  • All gaskets or seals necessary for water pump are included
  • This pump is driven by the accessory belt and we recommend replacement if nearing service recommendation
  • This pump is driven by the timing chain; see vehicle manufacturer recommendation for replacement of timing components
  • This pump is driven by the timing belt; see vehicle manufacturer recommendation for replacement of timing components
See More

Driveworks Water Pumps – Water Pump (Part No.58-512)

Water Pump

from

$43.99
Manufactured to meet or exceed OEM specifications.

Product Features:
  • 100% leak tested and hub-pull tested to promote a long, trouble-free performance life
  • Designed and manufactured with new, high-quality unitized seals from OE suppliers to ensure long, trouble-free performance
  • Each unit uses the proper bearing design as specified by the OE manufacturer to meet the specific radial torque and axial load requirements of each application to promote long bearing life and trouble-free performance
  • Supplied with high-quality mounting gasket and other seals/gaskets as applicable per application to help complete the job
  • Manufactured to original casting specifications to ensure a proper fit and proper water flow for efficient cooling
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Top-Rated Thermostats for 2003 Cadillac DeVilles

Make a smart move for your 2003 Cadillac DeVille with products all priced from $23.99 to $34.99.

Carquest Premium – Standard Thermostat: With Seal, 180 Degrees (Part No.14228)

Standard Thermostat: With Seal, 180 Degrees

from

$23.99
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:
  • High grade stainless steel and copper construction
  • Meets or exceeds OEM standards
  • Consistent and precise response to cooling system needs
  • Original equipment design for worry-free direct fit replacement
  • 100% tested and calibrated
See More

Motorad UltraStats – Thermostat: With Seal, 180 Degrees (Part No.5339-180)

Thermostat: With Seal, 180 Degrees

from

$34.99
UltraStat Thermostats are the toughest thermostats on the market. All heavy gauge stainless steel construction provides long-life durability, as well as complete corrosion resitance. Exclusive BLVT Valve technology minimizes thermal shock to cooling system components.

Product Features:
  • Heavy gauge stainless steel components offer increased reliability and long-lasting durability
  • Exclusive BLVT Valve Technology minimizes thermal shock to cooling system components
  • Stainless steel thermal element for unmatched corrosion resistance and revolutionary REAX wax mixture provides quicker reaction time
  • AccuSpring Design for stable temperature control and increased cabin comfort
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Top-Rated Engine Cooling Part Brands For Your 2003 Cadillac DeVille

When it comes to finding the perfect Engine Cooling Part for your 2003 Cadillac DeVille, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 10 trusted brands. We carry the most popular Engine Cooling Part brands including FELPRO, Carquest Premium, and Dorman, and more, all known for their exceptional customer ratings (average brand rating of 4.6 stars) and competitive prices, as low as $6.79. Purchasing a Engine Cooling Part from us here at Advance Auto Parts is a smart move for both you and your 2003 Cadillac DeVille, providing peace of mind with parts that meet or exceed OEM standards.

Popular FELPRO 2003 Cadillac DeVille Engine Cooling Parts

If you’re looking for a top-quality Engine Cooling Part for your 2003 Cadillac DeVille, Advance Auto Parts has exactly what you need with our selection of FELPRO Engine Cooling Parts. We have 3 FELPRO Engine Cooling Parts in stock for this fitment, all known for their durability and precision fit. With prices starting at just $6.79 and an average cost of $22.76, you’ll find the perfect Engine Cooling Part for your needs and budget. FELPRO Engine Cooling Parts for the 2003 Cadillac DeVille come highly rated, with over 15 customer reviews and an impressive average rating of 4.6 stars. Choosing a FELPRO Engine Cooling Part from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
WATER PUMP GASKET SET
from $6.79
(9)
WATER PUMP GASKET SET
“This was an exact fit for a 2004 Cadillac Deville. Great fit. The only difference between this one and stock is it is missing the little tab, which I'”
WATER PUMP GASKET SET
from $16.49
(1)
WATER PUMP GASKET SET
“i havnt come across a bad fel pro gasket yet.”
Engine Water Pump Installation Kit
from $44.99
(5)
Engine Water Pump Installation Kit
“gaskets worked fine, use some permatex to secure in place during assembly. buy some stubby metric ratchet wrenches for rear bolts. no room to work und”

Top-Quality Carquest Premium 2003 Cadillac DeVille Engine Cooling Parts

For those in search of a high-quality Engine Cooling Part for their 2003 Cadillac DeVille, Advance Auto Parts offers a great selection of Carquest Premium Engine Cooling Parts. With 3 Carquest Premium Engine Cooling Parts in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Engine Cooling Parts start at just $6.79, with an average price of $13.42, giving you a range of options to suit your budget. Backed by over 163 customer ratings and an average rating of 4.4 stars, Carquest Premium Engine Cooling Parts provide both reliability and excellent performance. Choosing a Carquest Premium Engine Cooling Part from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Coolant Housing/Water Outlet
from $22.99
(1)
Coolant Housing/Water Outlet
“Seems like a part that everyone should have, stock GM! But Advance was the only one! Think this will be my go to place. Great part, fast friendly serv”
Radiator Cap: 18 PSI
from $10.49
(44)
Radiator Cap: 18 PSI
“Fits as OEM -”
Radiator Cap: 18 PSI
from $6.79
(118)
Radiator Cap: 18 PSI
“A+”

FAQs for 2003 Cadillac DeVille Engine Cooling Parts

What are the best-selling Engine Cooling Parts for 2003 Cadillac DeVilles?

Out of 39 Engine Cooling Parts that fit 2003 Cadillac DeVilles, the following parts are the top sellers:

What’s the price range for 2003 Cadillac DeVille Engine Cooling Parts?

The prices of Engine Cooling Parts for the 2003 Cadillac DeVille range from $3.99 up to $273.99 for the most premium parts.

What is the average price of an Engine Cooling Part for a 2003 Cadillac DeVille?

The average price for Engine Cooling Parts for the 2003 Cadillac DeVille is $62.26. Keep in mind the variety of part types within our Engine Cooling Part category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Engine Cooling Parts for other Cadillac DeVille model years?

Yes, we carry Engine Cooling Parts for 51 model years of Cadillac DeVilles between 1953 and 2005. The following model years are the most popular for Engine Cooling Part purchases: 2005, 2004, 2002, 2001, 2000, 1999, 1998, 1997, and 1996.

What are the cheapest Engine Cooling Parts for my 2003 Cadillac DeVille?

The cheapest 2003 Cadillac DeVille Engine Cooling Parts we carry are:

Does Advance Auto Parts sell Engine Cooling Parts for any other 2003 Cadillac models?

Yes. We stock Engine Cooling Parts for 4 other popular 2003 Cadillac models. Some of the most popular are 2003 Escalade Engine Cooling Parts, 2003 Escalade ESV Engine Cooling Parts, 2003 Escalade EXT Engine Cooling Parts, 2003 Seville Engine Cooling Parts, and 2003 CTS Engine Cooling Parts.

What are the top-rated Engine Cooling Parts that fit the 2003 Cadillac DeVille?

The one 2003 Cadillac DeVille Engine Cooling Part we have in stock is the Radiator Support Head Dia 1.06In Shank Long 0.73In Hole Dia 0.39In. It costs $3.99.

What types of Engine Cooling Parts do you sell for my 2003 Cadillac DeVille?

As of 11/2/25, these are some of the most in-demand types of Engine Cooling Parts for a 2003 Cadillac DeVille:

Can I get help with 2003 Cadillac DeVille Engine Cooling Part orders?

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

What is your return policy for Cadillac DeVille Engine Cooling Parts?

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