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One Stop Solutions 618 Radiator

Brand	One Stop Solutions 618
Cap Included	NO
Core Height	28 1/4
Core Material	PA
Core Row Quantity	1
Core Thickness	1-1/4
Core Thickness	32
Core Width	17 1/4
Down Flow Or Cross Flow Type	CROSSFLOW
Engine Oil Cooler Included	NO
Engine Oil Cooler Type	NONE
Inlet Diameter	1 5/16
Inlet Header Length	18 3/4
Inlet Header Width	2 7/16
Outlet Diameter	1 9/16
Outlet Header Length	18 3/4
Outlet Header Width	2 7/16
Tank Material	PLASTIC
Transmission Oil Cooler Distance between Fittings	11 1/2
Transmission Oil Cooler Included	YES
Transmission Oil Cooler Type	PLATED
Fits	GMC and Chevrolet · 134 vehicles

O.E. form and function. Built as a direct-style radiator with a drop-in fit.

Premium aluminum construction. Cadmium-plated tubes help resist premature failure.

Pressure tested. Each unit is tested during production for leak-free performance.

Cross-references APDI 8010618, Four Seasons 20345 and Spectra Premium CU618 for the same application. See all 5.

$123.07Free shipping

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Radiator for Chevrolet and GMC Trucks

One Stop Solutions 618 is an OSC Premium new automotive radiator built to OE-style form and function for select Chevrolet and GMC applications. It uses a premium aluminum core with plastic tanks, a plated transmission oil cooler, and a crossflow design to support consistent engine temperature control.

Compatible With 1988-1995 Chevrolet C1500, 1988-1995 Chevrolet C2500, 1988-1995 Chevrolet K1500, 1989-1995 Chevrolet K2500, 1988-1994 Chevrolet C3500, 1988-1994 Chevrolet K3500, 1988-1995 GMC C1500, 1988-1995 GMC C2500, 1988-1995 GMC K1500, 1995 GMC K2500, 1988-1994 GMC C3500, 1988-1994 GMC K3500, and 1996-1997 GMC P3500. This part number 618 also cross-references APDI 8010618 for the same application.

Key Features

Core height: 28 1/4 in.
Core width: 17 1/4 in.
Core thickness: 1-1/4 in. with 1-row construction
Crossflow radiator design
Plastic tank construction with PA core material
Transmission oil cooler included
Inlet diameter: 1 5/16 in.; outlet diameter: 1 9/16 in.
Engine oil cooler not included
Die-cut gasket design for leak control
Individually pressure tested during production

Detailed Description

OSC radiator 618 is engineered for direct replacement service in Chevrolet C1500, C2500, K1500, K2500, C3500, K3500 and GMC C1500, C2500, K1500, K2500, C3500, K3500, plus GMC P3500 models listed above. The radiator is built with premium-grade tubes, fins, headers, and tanks, and the transmission cooler is integrated into the unit where equipped. OSC also uses cadmium-plated tubes inside and out to help resist premature failure, along with factory-style fitment details that support a clean installation and proper sealing.

This part number 618 is designed around OE cooler design requirements and includes the transmission oil cooler type specified for the application. The core measures 28 1/4 inches tall by 17 1/4 inches wide, with 18 3/4-inch inlet and outlet header lengths and 2 7/16-inch header widths. For Chevrolet and GMC truck owners replacing a worn radiator, this unit addresses cooling-system service needs while maintaining the original layout.

Common Problems This Radiator Can Address

Coolant leaks from aging tanks, seams, or gasket surfaces
Restricted cooling performance from a fatigued or damaged core
Transmission heat management concerns when the cooler circuit is worn
Fitment issues caused by distorted or corroded original radiator components
Temperature instability in higher-mileage Chevrolet and GMC trucks

Installation Notes and Tips

Verify radiator dimensions, inlet and outlet sizes, and cooler configuration against the original unit before installation. This radiator is a crossflow design and is intended for the listed Chevrolet and GMC applications without an engine oil cooler. Confirm hose routing, mounting points, and transmission cooler line connection style during replacement to ensure proper fit.

Quality Assurance

OSC tests the transmission and engine oil cooler circuits before tank installation, checks the core before assembly, and tests the completed radiator again after assembly. Each unit is individually pressure tested, and the design includes factory-style components and sealing features to support dependable service in the listed Chevrolet and GMC applications.

This part fits 134 vehicles

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

Year	Make	Model	Transmission	Liters	Cylinders	Fuel Type	Position	Notes
1997	GMC	P3500	Automatic	4.3L	V6	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1996	GMC	P3500	Automatic	4.3L	V6	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1995	Chevrolet	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1995	Chevrolet	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1995	Chevrolet	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1995	Chevrolet	K2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1995	GMC	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1995	GMC	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1995	GMC	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1995	GMC	K2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	Chevrolet	C1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	Chevrolet	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	Chevrolet	C2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	Chevrolet	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	Chevrolet	C3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	Chevrolet	K1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	Chevrolet	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	Chevrolet	K2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	Chevrolet	K2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	Chevrolet	K3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	GMC	C1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	GMC	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	GMC	C2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	GMC	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	GMC	C3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	GMC	K1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	GMC	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1994	GMC	K3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	Chevrolet	C1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	Chevrolet	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	Chevrolet	C2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	Chevrolet	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	Chevrolet	C3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	Chevrolet	K1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	Chevrolet	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	Chevrolet	K2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	Chevrolet	K2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	Chevrolet	K3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	GMC	C1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	GMC	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	GMC	C2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	GMC	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	GMC	C3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	GMC	K1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	GMC	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1993	GMC	K3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	Chevrolet	C1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	Chevrolet	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	Chevrolet	C2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	Chevrolet	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	Chevrolet	C3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	Chevrolet	K1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	Chevrolet	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	Chevrolet	K2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	Chevrolet	K2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	Chevrolet	K3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	GMC	C1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	GMC	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	GMC	C2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	GMC	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	GMC	C3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	GMC	K1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	GMC	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1992	GMC	K3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	Chevrolet	C1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	Chevrolet	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	Chevrolet	C2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	Chevrolet	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	Chevrolet	C3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	Chevrolet	K1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	Chevrolet	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	Chevrolet	K2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	Chevrolet	K2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	Chevrolet	K3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	GMC	C1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	GMC	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	GMC	C2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	GMC	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	GMC	C3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	GMC	K1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	GMC	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1991	GMC	K3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	Chevrolet	C1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	Chevrolet	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	Chevrolet	C2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	Chevrolet	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	Chevrolet	C3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	Chevrolet	K1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	Chevrolet	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	Chevrolet	K2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	Chevrolet	K2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	Chevrolet	K3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	GMC	C1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	GMC	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	GMC	C2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	GMC	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	GMC	C3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	GMC	K1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	GMC	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1990	GMC	K3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	Chevrolet	C1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	Chevrolet	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	Chevrolet	C2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	Chevrolet	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	Chevrolet	C3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	Chevrolet	K1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	Chevrolet	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	Chevrolet	K2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	Chevrolet	K2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	Chevrolet	K3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	GMC	C1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	GMC	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	GMC	C2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	GMC	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	GMC	C3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	GMC	K1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	GMC	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1989	GMC	K3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	Chevrolet	C1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	Chevrolet	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	Chevrolet	C2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	Chevrolet	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	Chevrolet	C3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	Chevrolet	K1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	Chevrolet	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	Chevrolet	K3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	GMC	C1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	GMC	C1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	GMC	C2500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	GMC	C2500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	GMC	C3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	GMC	K1500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	GMC	K1500	Automatic	5.0L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
1988	GMC	K3500	Automatic	5.7L	V8	GAS	N/A	Radiator without EOC; 1-3/8" core; 1 row equivalent
No rows match your filter.

Directly replaces or cross-references 5 part numbers

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

APDI — 8010618Four Seasons — 20345Spectra Premium — CU618Walker Exhaust — 50368432055

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