330+ 2003 Chevrolet Silverado 2500 HD Cooling System Base Parts - Page 3

Base · Cooling System (329 products)

Exact-fit parts for the 2003 Chevrolet Silverado 2500 HD Base.

Skyward Automotive

Part # SK603102

Fits with Conditions

Engine Coolant Reservoir

$46.87

Gates

Part # 18622

Confirmed Fit

Gates 99-12 Chevrolet Silverado V-8 5.3L Rad. To Reservoir Molded Heater Hose

$42.00

Four Seasons

Part # 36419

Fits with Conditions

Coolant Temp Sensor Switch

$17.34

aFe BladeRunner OER Series Radiator 99-13 GM Trucks/SUVs V8

aFe

Part # 46-53161

Confirmed Fit

aFe BladeRunner OER Series Radiator 99-13 GM Trucks/SUVs V8

$368.04

Gates

Part # CO34923

Fits with Conditions

Engine Coolant Water Outlet

$42.12

GPD

Part # 1712579

Fits with Conditions

gpd Coolant Temp Sensor

$43.80

Four Seasons

Part # 92023

Fits with Conditions

Aluminum Heater Core

$62.84

Designed to transfer glycol-based coolant throughout the vehicle's cooling system. The EPDM tube and cover and the synthetic reinforcement meets or exceeds SAE 20R4EC Class D1 specifications. Exact OEM configuration ensures a perfect fit.

ContiTech

Part # 62465

Fits with Conditions

Designed to transfer glycol-based coolant throughout the vehicle's cooling system. The EPDM tube and cover and the synthetic reinforcement meets or exceeds SAE 20R4EC Class D1 specifications. Exact OEM configuration ensures a perfect fit.

$27.50

Rostra

Part # 68-0011

Fits with Conditions

Engine Coolant Temperature Sender

$21.53

Gates

Part # 22650

Confirmed Fit

Gates 01-05 Chevrolet Silverado V-8 6.6L Diesel Lower Molded Coolant Hose

$76.42

GMB

Part # 130-5980AH

Confirmed Fit

Engine Water Pump with Housing

$113.40

UltraStat Thermostat Kit-187 Degrees w/ Seal

Motorad

Part # 524KTUS

Fits with Conditions

UltraStat Thermostat Kit-187 Degrees w/ Seal

$43.36

Motorad

Part # 447-185

Fits with Conditions

Thermostat-185 Degrees w/ Seal

$16.88

Elring

Part # 108.590

Fits with Conditions

Seal Ring, Coolant Pipe

$6.05

US Motor Works

Part # US64

Fits with Conditions

NEW WATER PUMP

$98.94

Motorad

Part # 1TS1209

Fits with Conditions

Engine Coolant Temperature Sensor

$12.20

Skyward Automotive

Part # SK902700

Fits with Conditions

Engine Coolant Thermostat Housing

$18.14

Wehrli

Part # WCF100645-GB

Confirmed Fit

Wehrli 01-07 Chevrolet 6.6L LB7/LLY/LBZ Duramax OEM Placement Coolant Tank Kit - Gloss Black

$532.03

Dorman

Part # 902-2060

Fits with Conditions

Engine Coolant Thermostat Housing

$32.85

Mishimoto

Part # R2370-AT

Confirmed Fit

Mishimoto Cadillac Escalade Replacement Radiator 2002-2014

$266.19

Frequently Asked Questions

Do these parts fit my 2003 Chevrolet Silverado 2500 HD Base?

This page groups parts listed for the 2003 Chevrolet Silverado 2500 HD Base. Some products fit every trim, while others depend on submodel, engine, drivetrain, or brake package. Use your trim in My Garage or the product page fitment check to confirm exact fit.

What cooling system options are available for my 2003 Chevrolet Silverado 2500 HD Base?

We offer a wide selection of cooling system parts for the 2003 Chevrolet Silverado 2500 HD Base. This page narrows the catalog to the year, make, and model; use your trim on product pages to confirm exact fit when a part only fits certain submodels.

What brands make parts for the 2003 Chevrolet Silverado 2500 HD Base?

We carry parts from trusted brands including Dorman, Wehrli, Four Seasons, Gates, and Motorad, plus many more. Filter by brand to find your preferred manufacturer.

How fast do 2003 Chevrolet Silverado 2500 HD Base parts ship?

Most in-stock items ship within 1-2 business days. Shipping rates are calculated at checkout based on your location.

What warranty do your 2003 Chevrolet Silverado 2500 HD Base parts come with?

Warranty coverage varies by manufacturer but typically ranges from 1 year to lifetime. Each product page includes specific warranty information from the manufacturer.

2003 Chevrolet Silverado 2500 HD(5,360 parts)

2003 Chevrolet Silverado 2500 HD(5,360 parts)

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Other Chevrolet Silverado 2500 HD Years

Base · Cooling System (329 products)

Engine Coolant Reservoir

Gates 99-12 Chevrolet Silverado V-8 5.3L Rad. To Reservoir Molded Heater Hose

Coolant Temp Sensor Switch

aFe BladeRunner OER Series Radiator 99-13 GM Trucks/SUVs V8

Engine Coolant Water Outlet

gpd Coolant Temp Sensor

Aluminum Heater Core

Designed to transfer glycol-based coolant throughout the vehicle's cooling system. The EPDM tube and cover and the synthetic reinforcement meets or exceeds SAE 20R4EC Class D1 specifications. Exact OEM configuration ensures a perfect fit.

Engine Coolant Temperature Sender

Gates 01-05 Chevrolet Silverado V-8 6.6L Diesel Lower Molded Coolant Hose

Engine Water Pump with Housing

UltraStat Thermostat Kit-187 Degrees w/ Seal

Thermostat-185 Degrees w/ Seal

Seal Ring, Coolant Pipe

NEW WATER PUMP

Engine Coolant Temperature Sensor

Engine Coolant Thermostat Housing

Wehrli 01-07 Chevrolet 6.6L LB7/LLY/LBZ Duramax OEM Placement Coolant Tank Kit - Gloss Black

Engine Coolant Thermostat Housing

Mishimoto Cadillac Escalade Replacement Radiator 2002-2014

Frequently Asked Questions

Do these parts fit my 2003 Chevrolet Silverado 2500 HD Base?

What cooling system options are available for my 2003 Chevrolet Silverado 2500 HD Base?

What brands make parts for the 2003 Chevrolet Silverado 2500 HD Base?

How fast do 2003 Chevrolet Silverado 2500 HD Base parts ship?

What warranty do your 2003 Chevrolet Silverado 2500 HD Base parts come with?