1990 GMC K1500 Radiator

Part Number: 4021-07386390

Notes: Radiator -- V8 5.0L; with 28 Inch Core; with Engine Oil Cooler

Features:

• 100% Leak Tested - Built to strict quality control standards.
• Direct Fit Replacement
• Premium Aluminum Core

Part Number: 4021-07988825

Notes: Radiator -- V8 5.0L; with 28 Inch Core; without Engine Oil Cooler

Features:

• 100% Leak Tested - Built to strict quality control standards.
• Direct Fit Replacement
• Premium Aluminum Core

Part Number: 4021-07791950

Notes: Radiator -- V8 5.0L; with 34 Inch Core; with Engine Oil Cooler

Features:

• 100% Leak Tested - Built to strict quality control standards.
• Direct Fit Replacement
• Premium Aluminum Core

Part Number: 4021-07386390

Notes: Radiator -- V8 5.7L; with 28 Inch Core; with Engine Oil Cooler

Features:

• 100% Leak Tested - Built to strict quality control standards.
• Direct Fit Replacement
• Premium Aluminum Core

Part Number: 4021-07988825

Notes: Radiator -- V8 5.7L; with 28 Inch Core; without Engine Oil Cooler

Features:

• 100% Leak Tested - Built to strict quality control standards.
• Direct Fit Replacement
• Premium Aluminum Core

Part Number: 4021-07791950

Notes: Radiator -- V8 5.7L; with 34 Inch Core; with Engine Oil Cooler

Features:

• 100% Leak Tested - Built to strict quality control standards.
• Direct Fit Replacement
• Premium Aluminum Core

Part Number: 4021-04015770

Notes: RADIATOR; 4.3 LITER V6; WITH ENGINE OIL COOLER; WITH TRANSMISSION OIL COOLER; PLASTIC AND ALUMINUM

Detailed Notes: Plastic and Aluminum Construction

Product Remark: Automatic or Manual Transmission; Core Dim: 20-3/4 x 18-1/2 x 1-3/8; EOC: 11-1/2 3-PLT; TOC: 11-1/2 4-PLT

Quality: Premium - High quality new replacement part.

Part Number: 4021-04015755

Notes: RADIATOR; 5.0/5.7 LITER V8; WITH ENGINE OIL COOLER; PLASTIC/ALUMINUM 28 1/4 X 17 1/4 X 1 5/16

Detailed Notes: Plastic and Aluminum Construction

Product Remark: Automatic or Manual Transmission; Core Dim: 28-1/4 x 18-1/2 x 1-1/4; EOC: 11-1/2 3-PLT; TOC: 11-1/2 4-PLT

Quality: Premium - High quality new replacement part.

Part Number: 4021-04015755

Notes: RADIATOR; 5.0/5.7 LITER V8; WITH ENGINE OIL COOLER; PLASTIC/ALUMINUM 28 1/4 X 17 1/4 X 1 5/16

Detailed Notes: Plastic and Aluminum Construction

Product Remark: 4.3L; Automatic or Manual Transmission; Core Dim: 28-1/4 x 18-1/2 x 1-1/4; EOC: 11-1/2 3-PLT; TOC: 11-1/2 4-PLT

Quality: Premium - High quality new replacement part.

Part Number: 4021-04015671

Notes: RADIATOR; 6.2 LITER V8 DIESEL; PLASTIC AND ALUMINUM

Detailed Notes: Plastic and Aluminum Construction

Product Remark: Automatic or Manual Transmission; Core Dim: 34 x 18-1/2 x 2-1/8; EOC: 8-1/2 4-PLATE; TOC: 8-1/2 4-PLATE

Quality: Premium - High quality new replacement part.

Part Number: 4021-04015757

Notes: RADIATOR; WITH ENIGINE OIL COOLER; WITH TRANSMISSION OIL COOLER 34 1/16 X 17 1/4 X 2 3/16; PLASTIC AND ALUMINUM

Detailed Notes: Plastic and Aluminum Construction

Product Remark: 5.0L; Automatic or Manual Transmission; Core Dim: 34 x 18-1/2 x 2-1/8; EOC: 8-1/2 4-PLATE; TOC: 8-1/2 5-PLATE

Quality: Premium - High quality new replacement part.

Part Number: 4021-04015757

Notes: RADIATOR; WITH ENIGINE OIL COOLER; WITH TRANSMISSION OIL COOLER 34 1/16 X 17 1/4 X 2 3/16; PLASTIC AND ALUMINUM

Detailed Notes: Plastic and Aluminum Construction

Product Remark: 5.7L; Automatic or Manual Transmission; Core Dim: 34 x 18-1/2 x 2-1/8; EOC: 8-1/2 4-PLATE; TOC: 8-1/2 5-PLATE

Quality: Premium - High quality new replacement part.

Part Number: 4021-04015685

Notes: RADIATOR; WITHOUT ENGINE OIL COOLER; PLASTIC AND ALUMIUM

Detailed Notes: Plastic and Aluminum Construction

Product Remark: 5.7L; Automatic or Manual Transmission; Core Dim: 20-3/4 x 18-1/2 x 1-3/8; EOC: NO; TOC: 11-1/2 4-PLT

Quality: Premium - High quality new replacement part.

Part Number: 4021-07352974

Notes: Radiator -- With Engine Oil Cooler, 1-3/8" THICK

Part Number: 4021-07352974

Notes: Radiator -- With Engine Oil Cooler, 28 1/4" CORE, 1-3/8" THICK

Part Number: 4021-09249366

Notes: Radiator -- ENHANCED UNIT; With Engine Oil Cooler; 34" CORE; Copper/Brass Radiator

Features:

• Hassle free installation
• O.E. performance and exceptional quality
• Engineering enhancements provide improved cooling and longer life cycle
• Components are fitted and torqued in place to factory specifications
• Premium grade tubes, fins, headers, tanks, and other components are used to make OSC radiators more durable.
• Drop in fit, form and function. All necessary fittings or hardware are included in each unit for an easy install.
• Complete Radiators 100% tested up to three times during production: OSC tests the transmission and engine oil coolers prior to installation into the tank. The radiator core is tested prior to assembly and then once the assembly is complete the unit is tes
• Enhancements added to solve original design failures and to improve the life of high mileage vehicles: adding more fins per inch, thicker cores and even larger transmission coolers to overcome the added heat associated with these vehicles.
• Show More
• Show Less

Part Number: 4021-09249366

Notes: Radiator -- ENHANCED UNIT; With Engine Oil Cooler; 34" CORE; Plastic Tank Radiator

Features:

• Hassle free installation
• O.E. performance and exceptional quality
• Engineering enhancements provide improved cooling and longer life cycle
• Components are fitted and torqued in place to factory specifications
• Premium grade tubes, fins, headers, tanks, and other components are used to make OSC radiators more durable.
• Drop in fit, form and function. All necessary fittings or hardware are included in each unit for an easy install.
• Complete Radiators 100% tested up to three times during production: OSC tests the transmission and engine oil coolers prior to installation into the tank. The radiator core is tested prior to assembly and then once the assembly is complete the unit is tes
• Enhancements added to solve original design failures and to improve the life of high mileage vehicles: adding more fins per inch, thicker cores and even larger transmission coolers to overcome the added heat associated with these vehicles.
• Show More
• Show Less

Part Number: 4021-09249369

Notes: Radiator -- With Engine Oil Cooler

Features:

• Hassle free installation
• O.E. performance and exceptional quality
• Engineering enhancements provide improved cooling and longer life cycle
• Components are fitted and torqued in place to factory specifications
• Premium grade tubes, fins, headers, tanks, and other components are used to make OSC radiators more durable.
• Drop in fit, form and function. All necessary fittings or hardware are included in each unit for an easy install.
• Complete Radiators 100% tested up to three times during production: OSC tests the transmission and engine oil coolers prior to installation into the tank. The radiator core is tested prior to assembly and then once the assembly is complete the unit is tes
• Enhancements added to solve original design failures and to improve the life of high mileage vehicles: adding more fins per inch, thicker cores and even larger transmission coolers to overcome the added heat associated with these vehicles.
• Show More
• Show Less

Part Number: 4021-05648972

Notes: Radiator -- With Engine Oil Cooler; 1" THICK

Features:

• Hassle free installation
• O.E. performance and exceptional quality
• Engineering enhancements provide improved cooling and longer life cycle
• Components are fitted and torqued in place to factory specifications
• Premium grade tubes, fins, headers, tanks, and other components are used to make OSC radiators more durable.
• Drop in fit, form and function. All necessary fittings or hardware are included in each unit for an easy install.
• Complete Radiators 100% tested up to three times during production: OSC tests the transmission and engine oil coolers prior to installation into the tank. The radiator core is tested prior to assembly and then once the assembly is complete the unit is tes
• Enhancements added to solve original design failures and to improve the life of high mileage vehicles: adding more fins per inch, thicker cores and even larger transmission coolers to overcome the added heat associated with these vehicles.
• Show More
• Show Less

Part Number: 4021-09249365

Notes: Radiator -- With Engine Oil Cooler; 1-3/8" THICK

Features:

• Hassle free installation
• O.E. performance and exceptional quality
• Engineering enhancements provide improved cooling and longer life cycle
• Components are fitted and torqued in place to factory specifications
• Premium grade tubes, fins, headers, tanks, and other components are used to make OSC radiators more durable.
• Drop in fit, form and function. All necessary fittings or hardware are included in each unit for an easy install.
• Complete Radiators 100% tested up to three times during production: OSC tests the transmission and engine oil coolers prior to installation into the tank. The radiator core is tested prior to assembly and then once the assembly is complete the unit is tes
• Enhancements added to solve original design failures and to improve the life of high mileage vehicles: adding more fins per inch, thicker cores and even larger transmission coolers to overcome the added heat associated with these vehicles.
• Show More
• Show Less

Part Number: 4021-05683987

Notes: Radiator -- With Engine Oil Cooler; 2-3/16" THICK

Features:

• Hassle free installation
• O.E. performance and exceptional quality
• Engineering enhancements provide improved cooling and longer life cycle
• Components are fitted and torqued in place to factory specifications
• Premium grade tubes, fins, headers, tanks, and other components are used to make OSC radiators more durable.
• Drop in fit, form and function. All necessary fittings or hardware are included in each unit for an easy install.
• Complete Radiators 100% tested up to three times during production: OSC tests the transmission and engine oil coolers prior to installation into the tank. The radiator core is tested prior to assembly and then once the assembly is complete the unit is tes
• Enhancements added to solve original design failures and to improve the life of high mileage vehicles: adding more fins per inch, thicker cores and even larger transmission coolers to overcome the added heat associated with these vehicles.
• Show More
• Show Less

Part Number: 4021-05648972

Notes: Radiator -- With Engine Oil Cooler; 28 1/4" CORE; 1" THICK

Features:

• Hassle free installation
• O.E. performance and exceptional quality
• Engineering enhancements provide improved cooling and longer life cycle
• Components are fitted and torqued in place to factory specifications
• Premium grade tubes, fins, headers, tanks, and other components are used to make OSC radiators more durable.
• Drop in fit, form and function. All necessary fittings or hardware are included in each unit for an easy install.
• Complete Radiators 100% tested up to three times during production: OSC tests the transmission and engine oil coolers prior to installation into the tank. The radiator core is tested prior to assembly and then once the assembly is complete the unit is tes
• Enhancements added to solve original design failures and to improve the life of high mileage vehicles: adding more fins per inch, thicker cores and even larger transmission coolers to overcome the added heat associated with these vehicles.
• Show More
• Show Less

Part Number: 4021-09249365

Notes: Radiator -- With Engine Oil Cooler; 28 1/4" CORE; 1-3/8" THICK

Features:

• Hassle free installation
• O.E. performance and exceptional quality
• Engineering enhancements provide improved cooling and longer life cycle
• Components are fitted and torqued in place to factory specifications
• Premium grade tubes, fins, headers, tanks, and other components are used to make OSC radiators more durable.
• Drop in fit, form and function. All necessary fittings or hardware are included in each unit for an easy install.
• Complete Radiators 100% tested up to three times during production: OSC tests the transmission and engine oil coolers prior to installation into the tank. The radiator core is tested prior to assembly and then once the assembly is complete the unit is tes
• Enhancements added to solve original design failures and to improve the life of high mileage vehicles: adding more fins per inch, thicker cores and even larger transmission coolers to overcome the added heat associated with these vehicles.
• Show More
• Show Less

Part Number: 4021-05683987

Notes: Radiator -- With Engine Oil Cooler; 28 1/4" CORE; 2 3/16" THICK

Features:

• Hassle free installation
• O.E. performance and exceptional quality
• Engineering enhancements provide improved cooling and longer life cycle
• Components are fitted and torqued in place to factory specifications
• Premium grade tubes, fins, headers, tanks, and other components are used to make OSC radiators more durable.
• Drop in fit, form and function. All necessary fittings or hardware are included in each unit for an easy install.
• Complete Radiators 100% tested up to three times during production: OSC tests the transmission and engine oil coolers prior to installation into the tank. The radiator core is tested prior to assembly and then once the assembly is complete the unit is tes
• Enhancements added to solve original design failures and to improve the life of high mileage vehicles: adding more fins per inch, thicker cores and even larger transmission coolers to overcome the added heat associated with these vehicles.
• Show More
• Show Less

Part Number: 4021-05650127

Notes: Radiator -- Without Engine Oil Cooler

Features:

• Hassle free installation
• O.E. performance and exceptional quality
• Engineering enhancements provide improved cooling and longer life cycle
• Components are fitted and torqued in place to factory specifications
• Premium grade tubes, fins, headers, tanks, and other components are used to make OSC radiators more durable.
• Drop in fit, form and function. All necessary fittings or hardware are included in each unit for an easy install.
• Complete Radiators 100% tested up to three times during production: OSC tests the transmission and engine oil coolers prior to installation into the tank. The radiator core is tested prior to assembly and then once the assembly is complete the unit is tes
• Enhancements added to solve original design failures and to improve the life of high mileage vehicles: adding more fins per inch, thicker cores and even larger transmission coolers to overcome the added heat associated with these vehicles.
• Show More
• Show Less

Part Number: 4021-05648973

Notes: Radiator -- Without Engine Oil Cooler; 1" CORE; 1 ROW Equivalent

Features:

• Hassle free installation
• O.E. performance and exceptional quality
• Engineering enhancements provide improved cooling and longer life cycle
• Components are fitted and torqued in place to factory specifications
• Premium grade tubes, fins, headers, tanks, and other components are used to make OSC radiators more durable.
• Drop in fit, form and function. All necessary fittings or hardware are included in each unit for an easy install.
• Complete Radiators 100% tested up to three times during production: OSC tests the transmission and engine oil coolers prior to installation into the tank. The radiator core is tested prior to assembly and then once the assembly is complete the unit is tes
• Enhancements added to solve original design failures and to improve the life of high mileage vehicles: adding more fins per inch, thicker cores and even larger transmission coolers to overcome the added heat associated with these vehicles.
• Show More
• Show Less

Part Number: 4021-09249363

Notes: Radiator -- Without Engine Oil Cooler; 1-3/8" CORE; 1 ROW Equivalent

Features:

• Hassle free installation
• O.E. performance and exceptional quality
• Engineering enhancements provide improved cooling and longer life cycle
• Components are fitted and torqued in place to factory specifications
• Premium grade tubes, fins, headers, tanks, and other components are used to make OSC radiators more durable.
• Drop in fit, form and function. All necessary fittings or hardware are included in each unit for an easy install.
• Complete Radiators 100% tested up to three times during production: OSC tests the transmission and engine oil coolers prior to installation into the tank. The radiator core is tested prior to assembly and then once the assembly is complete the unit is tes
• Enhancements added to solve original design failures and to improve the life of high mileage vehicles: adding more fins per inch, thicker cores and even larger transmission coolers to overcome the added heat associated with these vehicles.
• Show More
• Show Less

Part Number: 4021-05139277

Notes: Radiator -- With 28 1/4 inch Core; With Engine Oil Cooler And Transmission Oil Cooler

Features:

• Increased thermal performance, enhanced design features, and design commonization for maximum availability with the minimum amount of parts.
• Meets or exceeds the manufacturer's specifications that are ready to install.
• Engineering and manufactured under ISO TS16949 quality system, every radiator is 100% leak tested.

Part Number: 4021-07253612

Notes: Radiator -- With Engine Oil Cooler And Transmission Oil Cooler; With 2 1/4 inch Core; 34 inch x 17 inch Core

Features:

• Increased thermal performance, enhanced design features, and design commonization for maximum availability with the minimum amount of parts.
• Meets or exceeds the manufacturer's specifications that are ready to install.
• Engineering and manufactured under ISO TS16949 quality system, every radiator is 100% leak tested.

Part Number: 4021-05139286

Notes: Radiator -- With Engine Oil Cooler And Transmission Oil Cooler; With 20 3/4 inch Core

Features:

• Increased thermal performance, enhanced design features, and design commonization for maximum availability with the minimum amount of parts.
• Meets or exceeds the manufacturer's specifications that are ready to install.
• Engineering and manufactured under ISO TS16949 quality system, every radiator is 100% leak tested.

Part Number: 4021-07253497

Notes: Radiator -- Without Engine Oil Cooler; With 20 3/4 inch Core

Features:

• Increased thermal performance, enhanced design features, and design commonization for maximum availability with the minimum amount of parts.
• Meets or exceeds the manufacturer's specifications that are ready to install.
• Engineering and manufactured under ISO TS16949 quality system, every radiator is 100% leak tested.

Part Number: 4021-05139276

Notes: Radiator -- Without Engine Oil Cooler; With 28 inch Core

Features:

• Increased thermal performance, enhanced design features, and design commonization for maximum availability with the minimum amount of parts.
• Meets or exceeds the manufacturer's specifications that are ready to install.
• Engineering and manufactured under ISO TS16949 quality system, every radiator is 100% leak tested.

Part Number: 4021-07876042

Notes: Radiator

Part Number: 4021-05713174

Notes: Radiator -- With Engine Oil Cooler

Part Number: 4021-07876042

Notes: Radiator -- Without Engine Oil Cooler

Part Number: 4021-05331824

Notes: Radiator -- Without Engine Oil Cooler; 17" High Core; with 28" Core Width

Features:

• Durability tested on every new design
• Radiators are an important part of the engine's cooling system. The main function of the radiator is to extract and dissipate heat from the engine. Radiators help cool the engine for optimal performance.
• 100% Leak tested
• Direct fit replacement
• Designed to meet/exceed OE fit, form and function

Part Number: 4021-05330551

Notes: Radiator -- with 20-3/4" Core Width

Features:

• 100% Leak tested
• Designed to meet/exceed OE fit, form and function
• Direct fit replacement
• Durability tested on every new design
• Radiators are an important part of the engine's cooling system. The main function of the radiator is to extract and dissipate heat from the engine. Radiators help cool the engine for optimal performance.

Part Number: 4021-05331825

Notes: Radiator -- with 28-1/4" Core; with Engine Oil Cooler

Features:

• Durability tested on every new design
• Radiators are an important part of the engine's cooling system. The main function of the radiator is to extract and dissipate heat from the engine. Radiators help cool the engine for optimal performance.
• 100% Leak tested
• Direct fit replacement
• Designed to meet/exceed OE fit, form and function

Part Number: 4021-05331945

Notes: Radiator -- with Engine Oil Cooler

Features:

• Durability tested on every new design
• Radiators are an important part of the engine's cooling system. The main function of the radiator is to extract and dissipate heat from the engine. Radiators help cool the engine for optimal performance.
• 100% Leak tested
• Direct fit replacement
• Designed to meet/exceed OE fit, form and function

Part Number: W0133-1688365

Notes: GM OE Lifetime Warranty - w/ Trans. Oil Cooler (RPO V02) w/o Eng. Oil Cooler (28" Core Size)

Detailed Notes: Core Size: 28 1/4 X 17 3/8 X 1 3/8

Part Number: 4021-05469816

Notes: Radiator -- New; 3.73R (GT4), 2.73R (GU2), 3.08R (GU4), 3.42 RATIO (GU6), HEAVY DUTY RADIATOR & TRANSMISSION OIL COOLER (V02), ENGINE OIL COOLING SYSTEM (KC4); CORE SIZE 28 1/4IN X 17 3/8IN X 1 3/8IN, CODE G7

Part Number: 4021-05469816

Notes: Radiator -- New; 4.10R (GT5), 4.56R (HC4), HEAVY DUTY RADIATOR & TRANSMISSION OIL COOLER (V02), ENGINE OIL COOLING SYSTEM (KC4); CORE SIZE 28 1/4IN X 17 3/8IN X 1 3/8IN, CODE GC

Part Number: 4021-05469816

Notes: Radiator -- New; ENGINE OIL COOLING SYSTEM (KC4); CORE SIZE 28 1/4IN X 17 3/8IN X 1 3/8IN, CODE G6, G7

Part Number: 4021-05469816

Notes: Radiator -- New; HEAVY DUTY AUTOMATIC TRANSMISSION COOLER (5A6), HEAVY DUTY RADIATOR & TRANSMISSION OIL COOLER (V02), 4.10R (GT5), 4.56R (HC4), A/C - MANUAL CONTROLS (C60), HEAVY DUTY MANUAL TRANSMISSION COOLER (5A5); CORE SIZE 28 1/4IN X 17 3/8IN X 1 3/8IN, CODE GC, G3, G5

Part Number: W0133-1688128

Notes: Aluminum Core - w/ Trans. Oil Cooler (RPO V02) w/ Eng. Oil Cooler (RPO KC4) (34" Core Size)

Detailed Notes: Core Size: 34 X 17 1/4 X 2 1/8

Product Remark: Plastic Tank

Part Number: W0133-1688365

Notes: Aluminum Core - w/ Trans. Oil Cooler (RPO V02) w/o Eng. Oil Cooler (28" Core Size)

Part Number: 4021-05905863

Notes: Crossflow Radiator -- with 28 Inch Core; Without Engine Oil Cooler

Part Number: 4021-05723650

Notes: Crossflow Radiator -- with engine oil cooler; with 28 Core

Part Number: 4021-04015753

Notes: RADIATOR; 5.0/5.7 LITER V8; WITHOUT ENGINE OIL COOLER; WITH HEAVY DUTY TRANSMISSION OIL COOLER; 28 1/4 X 17 1/4 X 1 1/4; PLASTIC AND ALUMINUM

Detailed Notes: Plastic and Aluminum Construction

Product Remark: Automatic or Manual Transmission; Core Dim: 28-1/4 x 17-1/4 x 1-3/8; EOC: NO; TOC: 11-1/2 4-PLT

Quality: Premium - High quality new replacement part.

Part Number: W0133-1688128

Notes: GM OE Lifetime Warranty - w/ Trans. Oil Cooler (RPO V02) w/ Eng. Oil Cooler (RPO KC4) (34" Core Size)

Detailed Notes: Core Size: 34 X 17 1/4 X 2 1/8

Part Number: W0133-2435636

Notes: w/ Trans. Oil Cooler(RPO V02) w/ Eng. Oil Cooler (RPO KC4)

Part Number: 4021-05331826

Notes: Radiator -- with 17" x 34" Core

Features:

• Durability tested on every new design
• Radiators are an important part of the engine's cooling system. The main function of the radiator is to extract and dissipate heat from the engine. Radiators help cool the engine for optimal performance.
• 100% Leak tested
• Direct fit replacement
• Designed to meet/exceed OE fit, form and function

Part Number: 4021-05713167

Notes: Radiator

Part Number: 4021-05713173

Notes: Radiator

Part Number: 4021-05713173

Notes: Radiator -- Without Engine Oil Cooler