1981 CHEVROLET K20 Cooling & Heating - In Stock Filter Options - Vendor In Stock Filter Options

Summit Racing™ Direct-Fit Restoration Interior Trim Parts SUM-RP22492

Interior Vents, Dash, Defroster Grill, Rectangular, Plastic, Chrome Finish, Front Left or Right Side, Chevy, GMC, Truck, Each

Part Number: SUM-RP22492

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Four Seasons Fan Clutches 36949

Fan Clutch, Non-Thermal, AMC, Jeep, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: FSS-36949

4.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Reach Cooling Heater Cores 18-11693

Heater Core, Aluminum, Natural, Chevy, GMC, Each

Part Number: RCG-18-11693

Not Yet Reviewed

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Reach Cooling Radiators 41-730

Radiator

Part Number: RCG-41-730

Not Yet Reviewed

Estimated Ship Date: Feb 16, 2026 if ordered today

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Estimated Ship Date: Feb 16, 2026 if ordered today

Reach Cooling Radiators 41-161

Radiator

Part Number: RCG-41-161

Not Yet Reviewed

Estimated Ship Date: Feb 13, 2026 if ordered today

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Estimated Ship Date: Feb 13, 2026 if ordered today

Tuff Stuff Performance Standard-Volume Water Pumps 1529B

Water Pump, Mechanical, Standard-Volume, Iron, Black, Chevy, GMC, L6, Each

Part Number: TFF-1529B

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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OER Authorized Heater Cores 3027265

Heater Cores,1973-87 Chevrolet/GMC Truck W/ AC - Copper/Brass Heater Core (7-1/8" X 7-1/2" X 2")

Part Number: OER-3027265

Not Yet Reviewed

Estimated Ship Date: May 14, 2026 if ordered today

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Estimated Ship Date: May 14, 2026 if ordered today

PRW Competition+ Mechanical Water Pumps 1435012

Water Pump, Mechanical, High-Volume, Clockwise, Aluminum, Polished, Buick, Chevrolet, GMC, Oldsmobile, Pontiac, Each

Part Number: PQX-1435012

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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US Motor Works Mechanical Water Pumps US1121

Water Pump, Mechanical, Standard-volume, Iron, Natural, Buick, Chevrolet, GMC, Oldsmobile, Pontiac, Each

Part Number: UMW-US1121

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Brothers Trucks Air Vent Outlets 05-157

Dash Vent Outlet, Square, Plastic, Black and Chrome, Driver Side, Chevy, GMC, Each

Part Number: HCT-05-157

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Proform Electric Water Pumps 66225C

Water Pump, Electric, 35 gpm, Die-Cast Aluminum, Chrome, Chevy, Small Block, Each

Part Number: PRO-66225C

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Reach Cooling Heater Cores 18-11695

Heater Core, Aluminum, Natural, Chevy, GMC, Each

Part Number: RCG-18-11695

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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MotoRad Thermostats 300-195

Thermostat, 195 Degrees F, Stainless Steel, Each

Part Number: SNN-300-195

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Four Seasons Fan Clutches 36704

Fan Clutch, Severe Duty Thermal, Each

Part Number: FSS-36704

1.5 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Hayden Fan Clutches 1705

Fan Clutch, Non-Thermal, AMC, Buick, Chevy, Oldsmobile, Pontiac, GMC, Each

Part Number: HDA-1705

4.8 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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Brothers Trucks Aluminum Radiators ALR87C4

Radiators, Crossflow, 4-row, Aluminum, Natural, Upper Left Side Inlet, Transmission Cooler, Chevrolet, GMC, Each

Part Number: HCT-ALR87C4

Not Yet Reviewed

Estimated Ship Date: Feb 19, 2026 if ordered today

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Estimated Ship Date: Feb 19, 2026 if ordered today

Four Seasons Complete Air Conditioning Kits 6485NK

A/C Compressor Kit, Accumulator, Orifice Tube, Oil, Seals, R-12, Aluminum, Natural, A6, Buick, Chevy, GMC, Pontiac, Kit

Part Number: FSS-6485NK

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Universal Air Conditioner Radiators RA 716C

Radiator

Part Number: UAC-RA716C

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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GMB OE Replacement Water Pumps 130-1250HD

Water Pump, OE Replacement, High-Volume, Cast Iron, Chevy, Small Block, Long Pump, Each

Part Number: GMB-130-1250HD

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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Fluidyne High Performance Radiators RGM.3R3320.A

Radiator, Aluminum, Natural, Automatic, Chevy, GMC, Each

Part Number: FLD-RGM-3R3320-A

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Tuff Stuff Performance Supercool Water Pumps 1511NC

Water Pump, Mechanical, High-Volume, Aluminum, Natural, Chevy, Small Block, Long Pump, Each

Part Number: TFF-1511NC

2.5 out of 5 stars ( 2 )

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Tuff Stuff Performance Platinum Series Water Pumps 1511NA

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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Fluidyne High Performance Radiators RGM.3R3320.M

Radiator, Aluminum, Natural, Manual, Chevy, GMC, Each

Part Number: FLD-RGM-3R-3320M

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Hayden Fluid Coolers 461

Fluid Cooler, Engine, Tube, Fin, Natural, 10 in. x 12.25 in. x 0.75 in., 3/8 in. Inlet, Outlet, Each

Part Number: HDA-461

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Jan 16, 2026 if ordered today

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Estimated Ship Date: Jan 16, 2026 if ordered today

Four Seasons Blower Motor Wheels 35601

Blower Motor Wheel, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Dodge, Ford, Volvo, Each

Part Number: FSS-35601

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Four Seasons Blower Motors 35588

HVAC Blower Motor, Replacement, Each

Part Number: FSS-35588

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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