2003 GMC SIERRA 1500 Cooling & Heating

Radiator, Exact Fit, Aluminum, Plastic, Cadillac, Chevy, GMC, 4.8L, 5.3L, Each

Part Number: SUM-380545

4.2 out of 5 stars ( 5 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Water Neck, O-ring Sealing Style, Aluminum, Natural, 186 degree Thermostat, Buick, Cadillac, Chevy, GMC, Each

Part Number: ADO-15-11057

4.37 out of 5 stars ( 19 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Fan Clutch, Engine Cooling, Standard Thermal Style, Counterclockwise, Each

Part Number: ADO-15-4694

4.92 out of 5 stars ( 13 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Electric Fan, Single, 14 in. Diameter, Reversible, 1,250 cfm, Black, Plastic, Each

Part Number: HDA-3690

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Electric Fan, Dual, 13 1/2 in. Diameter, Puller, 4,600 cfm, Black, Plastic, Chevy, GMC, Each

Part Number: FLX-105398

4.33 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Thermostat, 187 Degree, WithThermostat Housing, Copper/Brass, Stainless Body, GM, Each

Part Number: SUM-367-187

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Water Pump, Mechanical, Standard-volume, Aluminum, Natural, Counterclockwise Rotation, Cadillac, Chevy, GMC, Hummer

Part Number: ADO-12703898

4.43 out of 5 stars ( 7 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Water Pump, Mechanical, Aluminum, Natural, Cadillac, Chevy, GMC, 4.8/5.3/6.0L, Each

Part Number: GMB-130-7340

4.59 out of 5 stars ( 41 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Fan Switch, Thermostatic, Radiator Probe, Adjustable 160-240 Degrees F, Kit

Part Number: HDA-3653

4.52 out of 5 stars ( 84 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

WATER PUMP

Part Number: PQX-1434611

Not Yet Reviewed

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Fluid Cooler, Rapid-Cool, 9.25 in. Height x 13 in. Width x 1.7 in, Aluminum, Black, Each

Part Number: HDA-778

Not Yet Reviewed

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Electric Fan, Dual, 15 in. Diameter, Puller, 5,500 cfm, Black, Plastic, Chevy, GMC, Each

Part Number: FLX-116525

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Fan Switch, Thermostatic, Thread-In, Adjustable 160-210 Degrees F, Kit

Part Number: HDA-3651

3.03 out of 5 stars ( 31 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Water Neck, Aluminum, Natural, Each

Part Number: ADO-15-10412

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Transmission Oil Cooler, Plate, Natural, 11 in. x 6 in. x 0.75 in., 3/8 in. Inlet, Outlet, Each

Part Number: HDA-676

4.43 out of 5 stars ( 7 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Fluid Cooler, Transmission, Tube, Fin, Natural, 7.5 in. x 12.5 in. x 0.75 in., 3/8 in. Inlet, Outlet, Each

Part Number: HDA-403

4.61 out of 5 stars ( 44 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Transmission Oil Cooler, Rapid-Cool, Thermal Bypass Plate, Natural, 11 in. x 11.625 in. x 0.75 in., 3/8 in. Hose Barb, Aluminum, Each

Part Number: HDA-699

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Water Neck, Aluminum, Chrome Plated, Swivel, 60 Degree, Chevrolet, LS, Each

Part Number: MRG-2670

4.37 out of 5 stars ( 19 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Transmission Oil Cooler, Rapid-Cool, Thermal Bypass Plate, Natural, 11 in. x 9 in. x 0.75 in., 3/8 in. Hose Barb, Aluminum, Each

Part Number: HDA-698

4.83 out of 5 stars ( 6 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Fluid Cooler, Engine, Tube and Fin, Natural, 6.50 in. x 18.00 in. x 1.50 in., Each

Part Number: HDA-1040

3.92 out of 5 stars ( 13 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Fluid Cooler, Transmission, Tube, Fin, Natural, 10 in. x 15.875 in. x 0.75 in., 3/8 in. Inlet, Outlet, Each

Part Number: HDA-405

4.73 out of 5 stars ( 11 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Fluid Cooler, Engine Oil Type, Stacked Plate, Aluminum, Black, -8 AN Male Threads Inlet/Outlet, Kit

Part Number: DER-15651

Not Yet Reviewed

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Thermostat, with Seal, 160 Degrees F, Stainless Steel, Each

Part Number: SNN-456-160

3.75 out of 5 stars ( 4 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Fan Clutch, Severe-Duty Thermal, Chevy, GMC, Isuzu, Oldsmobile, Each

Part Number: HDA-2786

4.88 out of 5 stars ( 17 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Water Neck, Aluminum, Polished, Straight Up, 1.50 in. Hose, GM, LS Engine, Each

Part Number: MRG-2671NA

3.5 out of 5 stars ( 8 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air