2003 GMC W4500 Forward Cooling and Climate Controls

Essential 2003 GMC W4500 Forward Cooling and Climate Controls

Driveworks Water Pumps – Engine Water Pump (Part No.58-562)

Engine Water Pump

from

$101.99
This replacement engine water pump is leak and flow tested. Gaskets and seals are included where applicable.

Product Features:
  • This pump is used on accessory belt driven applications
  • Used mostly on models equipped with a fan clutch
  • It is highly recommended that the fan clutch be replaced with the water pump
  • All gaskets or seals necessary for installation are supplied with pump
  • Durable housing features precisely machined mounting surfaces for proper sealing
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Factory Air – Compressor Mounted High Cut-Out Pressure Switch (Part No.20055)

Compressor Mounted High Cut-Out Pressure Switch

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$34.49
High quality OE replacement part with all components needed to complete the job

Product Features:
  • Contains gaskets, O-rings, or seals to properly replace the product
  • Color coded for easy identification
  • Zinc coated to resist corrosion
  • Improved 2 terminal design replacing older 1 terminal switch
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Dorman – HD Solutions – Non-Pressurized Coolant Reservoir (Part No.603-5603)

Non-Pressurized Coolant Reservoir

from

$153.99
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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Factory Air – Compressor Mounted High Cut-Out Pressure Switch (Part No.20058)

Compressor Mounted High Cut-Out Pressure Switch

from

$29.49
High quality OE replacement part with all components needed to complete the job

Product Features:
  • Contains gaskets, O-rings, or seals to properly replace the product
  • Color coded for easy identification
  • Zinc coated to resist corrosion
  • Improved 2 terminal design replacing older 1 terminal switch
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Dorman – Thermostat Assembly: Includes Housing, Thermostat, and Gasket, 186 Degrees (Part No.902-700)

Thermostat Assembly: Includes Housing, Thermostat, and Gasket, 186 Degrees

from

$33.99
This replacement engine coolant thermostat housing assembly is engineered to match the fit and durability of the stock housing assembly on specified vehicles. It is designed to withstand extreme temperature changes to extend service life.

Product Features:
  • Ideal replacement – this engine coolant thermostat housing assembly directly replaces the original water outlet on specified vehicle years, makes and models
  • Durable construction – this part is specifically designed to withstand extreme temperature changes and resist cracking and leaking
  • Cost-effective and reliable – offers original manufacturer quality at lower cost than getting replacement at dealer
  • Industry-leading design – professionally engineered by the aftermarket leader in replacement thermostat housing assemblies
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Imperial – Electric Fan – 12" Diameter (Part No.226112)

Electric Fan - 12" Diameter

from

$94.99
Electric fan with 12″ diameter. Imperial electric fans are reversible for push or pull operation and are designed with a thin, aerodynamic profile for applications with limited space.

Product Features:
  • Rapid-Cool® Thin-Line electric fans
  • 12″ Diameter
  • 800 CFM
  • Use as a pusher or puller fan
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Dorman – Coolant Housing/Water Outlet: With Housing, 30 Degree Neck Angle (Part No.902-836)

Coolant Housing/Water Outlet: With Housing, 30 Degree Neck Angle

from

$35.49
This replacement engine coolant thermostat housing is engineered to match the fit and durability of the stock thermostat housing on specified vehicles. It is designed to withstand extreme temperature changes to extend service life.

Product Features:
  • Ideal replacement – this engine coolant thermostat housing directly replaces the original housing on specified vehicle years, makes and models
  • Durable construction – this part is specifically designed to withstand extreme temperature changes and resist cracking and leaking
  • Cost-effective and reliable – offers original manufacturer quality at lower cost than getting replacement at dealer
  • Industry-leading design – professionally engineered by the aftermarket leader in replacement thermostat housings
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Dorman – Clutch Fan Blade: Plastic, Cost Effective And Reliable (Part No.620-5603)

Clutch Fan Blade: Plastic, Cost Effective And Reliable

from

$151.99
Replace your damaged cooling fan blade with this direct replacement. This vehicle-specific application is engineered for a perfect fit and is made from quality materials to ensure durability and restore proper cooling system operation.

Product Features:
  • Direct replacement – this engine cooling fan blade fits and functions like the original equipment fan blade
  • Quality construction – manufactured from premium materials for a long service life
  • Excellent value – original equipment quality at a lower price
  • Quality tested – has undergone testing to ensure proper fit and performance
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Carquest Premium – A/C Compressor Switch Connector (Part No.PTA1328)

A/C Compressor Switch Connector

from

$15.79
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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Carquest Premium – A/C Compressor Switch Connector (Part No.PTA1329)

A/C Compressor Switch Connector

from

$17.79
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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Imperial – Adjustable Thermostatic Fan Control (Part No.226204)

Adjustable Thermostatic Fan Control

from

$55.99
Adjustable Thermostatic Fan Control. 160-210°F; push-in probe. Controls the operating temperature of Imperial electric fans. Operates up to 2 fans.

Product Features:
  • Adjustable thermostatic fan control
  • 160-210°F push-in probe
  • For use with Imperial electric fans
  • Probe installs into radiator fins
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Imperial – Thermostatic Fan Control – Adjustable (Part No.226208)

Thermostatic Fan Control - Adjustable

from

$62.99
Controls the operating temperature of Imperial electric fans. Operates up to 2 fans.

Product Features:
  • Adjustable thermostatic fan control
  • 160°F – 210°F thread-in probe
  • For use with Imperial electric fans
  • Thread-in probe for installation in water jacket or radiator
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Dorman – Water Pump Mounting Hardware Kit (Part No.902-804)

Water Pump Mounting Hardware Kit

from

$14.99
This engine water pump stud kit is designed to match the original hardware required to repair the water pump on specified vehicles. Made of quality components, this kit is engineered for reliable performance and durability.

Product Features:
  • Direct replacement – this engine water pump stud kit is designed to match the original hardware required to repair the water pump on specified vehicles
  • Ideal solution – this kit is a reliable replacement for original hardware that is missing or damaged
  • Durable construction – this kit is made from quality components to ensure reliable performance and a 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 – Electric Fan – 14" Diameter (Part No.226114)

Electric Fan - 14" Diameter

from

$99.99
Product Features:
  • Motors built and tested to quality specifications
  • 14 in. universal fit reversible fan
  • 1250 CFM
  • UNIVERSAL fan, NOT a direct OE replacement. Measure core and verify space.
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Dorman – HD Solutions – Engine Coolant Reservoir Cap: Twist, Plastic/Rubber/Metal, 1 Pack (Part No.924-1059)

Engine Coolant Reservoir Cap: Twist, Plastic/Rubber/Metal, 1 Pack

from

$36.99
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 – Thermal Fan Clutch – Severe Duty Reverse Rotation (Part No.215113)

Thermal Fan Clutch - Severe Duty Reverse Rotation

from

$93.99
Product Features:
  • Designed, tested, and built by application
  • OE performance, fit, and appearance
  • Precision machined
  • Out of box installation
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Carquest Premium – Heavy Duty Thermostat: With Seal, 185 Degrees (Part No.14968)

Heavy Duty Thermostat: With Seal, 185 Degrees

from

$38.49
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
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Motorad UltraStats – Thermostat: With Seal, 195 Degrees (Part No.5265-195)

Thermostat: With Seal, 195 Degrees

from

$18.29
This premium upgraded thermostat is everything you were looking for. UltraStat Thermostats are the toughest thermostats on the market. All heavy gauge stainless steel construction provides long-life durability, as well as complete corrosion resistance. Exclusive BLVT Valve technology minimizes thermal shock to cooling system components. This is the perfect upgrade to help insure your cooling system is working exactly as you need and expect it to for longevity.

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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Carquest Premium – Heavy Duty Thermostat: With Seal, 180 Degrees (Part No.14868)

Heavy Duty Thermostat: With Seal, 180 Degrees

from

$67.99
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
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Motorad UltraStats – Thermostat: With Seal, 187 Degrees (Part No.5456-187)

Thermostat: With Seal, 187 Degrees

from

$27.49
This premium upgraded thermostat is everything you were looking for. UltraStat Thermostats are the toughest thermostats on the market. All heavy gauge stainless steel construction provides long-life durability, as well as complete corrosion resistance. Exclusive BLVT Valve technology minimizes thermal shock to cooling system components. This is the perfect upgrade to help insure your cooling system is working exactly as you need and expect it to for longevity.

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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Omix – AC Bolt M10x1.5×65 (Part No.17955.01)

AC Bolt M10x1.5x65

from

$8.79
AC Bolt M10x1.5×65

Carquest Premium – Radiator: With Transmission Oil Cooler (Part No.867203)

Radiator: With Transmission Oil Cooler

from

$649.99
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)
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Carquest Premium – Radiator: With Transmission Oil Cooler (Part No.867204)

Radiator: With Transmission Oil Cooler

from

$659.99
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)
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2003 GMC W4500 Forward Cooling and Climate Controls

You count on your 2003 GMC W4500 Forward 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 Cooling and Climate Controls. With 36 Cooling and Climate Controls ranging in price from $8.79 to $649.99, you’re sure to find everything you need for your 2003 GMC W4500 Forward.

Brands matter. If you want to shop a specific Cooling and Climate Controls brand, we stock 9 different brands like Carquest Premium, DriveWorks, and Imperial. 2003 GMC W4500 Forward Cooling and Climate Controls start as low as $8.79!

One of the best ways to find top quality OEM or aftermarket Cooling and Climate Controls is by asking professionals. Short of that, you can shop with confidence thanks to our 1,047 extensive product reviews on 2003 GMC W4500 Forward Cooling and Climate Controls. Some of the top-rated Cooling and Climate Controls products we carry are Adjustable Thermostatic Fan Control with 3.4 stars and Electric Fan – 14" Diameter with 3.5 stars.

Did we mention you can order your Cooling and Climate Controls 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 Cooling and Climate Controls inventory for your 2003 GMC W4500 Forward below to get started!

Top-Rated Cooling and Climate Controls Brands For Your 2003 GMC W4500 Forward

Trusted Cooling and Climate Controls OEM and aftermarket product brands are what Advance Auto Parts specializes in. The brands we work with are sure to keep that 2003 GMC W4500 Forward running right for years to come. In our inventory you’ll find brands like Carquest Premium, DriveWorks, Imperial, and even more.

Popular Dorman Cooling and Climate Controls

You’ll find popular Dorman brand products across Engine Cooling Parts. All are waiting to get your 2003 GMC W4500 Forward back on the road. Some of the top-rated Dorman products in these categories are:
Water Pump Mounting Hardware Kit
from $14.99
(1)
Water Pump Mounting Hardware Kit
Water Pump Install. Kits

Top-Rated Carquest Premium Cooling and Climate Controls


If Carquest Premium are what you’re looking for, our inventory holds plenty. We stock Carquest Premium brand Cooling and Climate Controls for your 2003 GMC W4500 Forward, and some of our most reviewed Carquest Premium parts include:
Standard Thermostat: With Seal, 187 Degrees
from $18.79
(189)
Standard Thermostat: With Seal, 187 Degrees
Thermostats
Integrated Thermostat Housing: With Seal, 187 Degrees
from $23.49
(173)
Integrated Thermostat Housing: With Seal, 187 Degrees
Thermostat and Water Outlet Assemblies
Thermal Fan Clutch - Severe Duty Reverse Rotation
from $93.99
(5)
Thermal Fan Clutch – Severe Duty Reverse Rotation
Radiator Fan Clutch

FAQs for 2003 GMC W4500 Forward Cooling and Climate Controls

What are the most purchased Cooling and Climate Controls for the 2003 GMC W4500 Forward?

Out of 36 Cooling and Climate Controls for the 2003 GMC W4500 Forward, the most popular in our inventory are:
Engine Water Pump
from $101.99
(345)
Engine Water Pump
Water Pumps
Thermostat: With Seal, 187 Degrees
from $27.49
This product is not rated
Thermostat: With Seal, 187 Degrees
Thermostats
Adjustable Thermostatic Fan Control
from $22.99
(35)
Adjustable Thermostatic Fan Control
Engine Cooling Fan Controllers

What are the top-rated 2003 GMC W4500 Forward Cooling and Climate Controls?

Top-rated Cooling and Climate Controls for your 2003 GMC W4500 Forward based on customer reviews/ratings are:
Adjustable Thermostatic Fan Control
from $55.99
(33)
Adjustable Thermostatic Fan Control
“If you read the instructions it’s pretty self explanatory.”
Electric Fan - 14" Diameter
from $99.99
(14)
Electric Fan – 14" Diameter
“Fit fine. Easy install. Cools the car.”
Compressor Mounted High Cut-Out Pressure Switch
from $36.99
(10)
Compressor Mounted High Cut-Out Pressure Switch
“Worked Well”