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Part #: 618

One Stop Solutions 618 Radiator

⚙️ 134 vehicles fit this part
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✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: GMC and Chevrolet, P3500, C1500, C2500, K1500, K2500, C3500, and K3500
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Reliable Radiator Replacement for Chevrolet and GMC Trucks

The One Stop Solutions radiator part number 618 is engineered to provide dependable cooling performance for Chevrolet and GMC heavy-duty trucks. Designed specifically for models including C1500, C2500, C3500, K1500, K2500, K3500, and P3500, this radiator ensures proper fitment and efficient heat dissipation.

  • Hassle free installation with drop-in fit, form, and function
  • OE performance with premium grade tubes, fins, headers, and tanks
  • Engineering enhancements for improved cooling and extended service life
  • Includes a plated transmission oil cooler with fittings spaced 11 1/2 inches apart
  • Crossflow core design with 1 row and plastic tanks for durability
  • Tested up to three times during production for quality assurance
  • Components fitted and torqued to factory specifications

Detailed Radiator Specifications and Features

This radiator features a crossflow core measuring 28 1/4 inches in height, 17 1/4 inches in width, and 1 1/4 inches thick, constructed with premium PA core material. The plastic tanks provide corrosion resistance while maintaining structural integrity. Both inlet and outlet headers measure 18 3/4 inches in length and 2 7/16 inches in width, with inlet and outlet diameters of 1 5/16 inches and 1 9/16 inches respectively. The included transmission oil cooler is plated and designed to fit seamlessly with the radiator, enhancing transmission fluid cooling without the need for additional components. This radiator does not include an engine oil cooler or cap.

Compatible Vehicles and Common Applications

This radiator is compatible with the following Chevrolet and GMC truck models:

  • Chevrolet C1500, C2500, C3500
  • GMC K1500, K2500, K3500
  • GMC P3500

It is ideal for addressing issues such as:

  • Overheating due to radiator core damage or clogging
  • Leaking plastic tanks or headers
  • Transmission fluid overheating in vehicles equipped with transmission coolers
  • Reduced cooling efficiency from worn or corroded components
  • Failure of original radiator components causing engine temperature fluctuations

Installation Notes and Tips

Installation of the One Stop Solutions radiator 618 is straightforward due to its drop-in design. Ensure all fittings and hardware are included and properly torqued to factory specifications. Verify the transmission oil cooler connections match the 11 1/2 inch spacing between fittings. It is recommended to flush the cooling system before installation to prevent contamination. Check hose diameters (1 5/16 inch inlet and 1 9/16 inch outlet) for compatibility with existing hoses.

Quality Assurance and Warranty Information

Each radiator undergoes up to three quality tests during production to ensure reliability and performance. Components are assembled and torqued to meet factory standards. The product includes engineering enhancements to address original design weaknesses and improve longevity. Warranty details should be confirmed with the distributor or manufacturer, as coverage may vary.

BrandOne Stop Solutions
Part Number618
Cap IncludedNO
Core Height28 1/4
Core MaterialPA
Core Row Quantity1
Core Thickness1-1/4
Core Thickness32
Core Width17 1/4
Down Flow Or Cross Flow TypeCROSSFLOW
Engine Oil Cooler IncludedNO
Engine Oil Cooler TypeNONE
Inlet Diameter1 5/16
Inlet Header Length18 3/4
Inlet Header Width2 7/16
Outlet Diameter1 9/16
Outlet Header Length18 3/4
Outlet Header Width2 7/16
Tank MaterialPLASTIC
Transmission Oil Cooler Distance between Fittings11 1/2
Transmission Oil Cooler IncludedYES
Transmission Oil Cooler TypePLATED

This part fits 134 vehicles. Search below:

YearMakeModelTransmissionLitersCylindersFuel TypePositionNotes
1997GMCP3500Automatic4.3LV6GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1996GMCP3500Automatic4.3LV6GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1995ChevroletC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1995ChevroletC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1995ChevroletK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1995ChevroletK2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1995GMCC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1995GMCC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1995GMCK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1995GMCK2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994ChevroletC1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994ChevroletC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994ChevroletC2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994ChevroletC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994ChevroletC3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994ChevroletK1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994ChevroletK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994ChevroletK2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994ChevroletK2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994ChevroletK3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994GMCC1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994GMCC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994GMCC2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994GMCC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994GMCC3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994GMCK1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994GMCK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1994GMCK3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993ChevroletC1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993ChevroletC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993ChevroletC2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993ChevroletC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993ChevroletC3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993ChevroletK1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993ChevroletK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993ChevroletK2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993ChevroletK2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993ChevroletK3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993GMCC1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993GMCC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993GMCC2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993GMCC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993GMCC3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993GMCK1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993GMCK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1993GMCK3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992ChevroletC1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992ChevroletC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992ChevroletC2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992ChevroletC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992ChevroletC3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992ChevroletK1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992ChevroletK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992ChevroletK2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992ChevroletK2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992ChevroletK3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992GMCC1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992GMCC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992GMCC2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992GMCC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992GMCC3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992GMCK1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992GMCK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1992GMCK3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991ChevroletC1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991ChevroletC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991ChevroletC2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991ChevroletC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991ChevroletC3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991ChevroletK1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991ChevroletK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991ChevroletK2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991ChevroletK2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991ChevroletK3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991GMCC1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991GMCC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991GMCC2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991GMCC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991GMCC3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991GMCK1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991GMCK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1991GMCK3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990ChevroletC1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990ChevroletC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990ChevroletC2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990ChevroletC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990ChevroletC3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990ChevroletK1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990ChevroletK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990ChevroletK2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990ChevroletK2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990ChevroletK3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990GMCC1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990GMCC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990GMCC2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990GMCC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990GMCC3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990GMCK1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990GMCK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1990GMCK3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989ChevroletC1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989ChevroletC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989ChevroletC2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989ChevroletC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989ChevroletC3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989ChevroletK1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989ChevroletK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989ChevroletK2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989ChevroletK2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989ChevroletK3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989GMCC1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989GMCC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989GMCC2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989GMCC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989GMCC3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989GMCK1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989GMCK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1989GMCK3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988ChevroletC1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988ChevroletC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988ChevroletC2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988ChevroletC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988ChevroletC3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988ChevroletK1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988ChevroletK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988ChevroletK3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988GMCC1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988GMCC1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988GMCC2500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988GMCC2500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988GMCC3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988GMCK1500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988GMCK1500Automatic5.0LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent
1988GMCK3500Automatic5.7LV8GASN/ARadiator without EOC; 1-3/8" core; 1 row equivalent

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

20345432055503688010618CU618

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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