OE Quality
60-Day Returns

Dorman 624-623 Automatic Transmission Oil Cooler Hose Assembly - Auxiliary Cooler to Radiator (Passenger Side)
Reliable Automatic Transmission Oil Cooler Hose Assembly
The Dorman 624-623 automatic transmission oil cooler hose assembly is designed to provide a durable and flexible connection for your vehicle's transmission cooling system. Engineered to meet the demands of Chevrolet and GMC heavy-duty trucks, this hose assembly ensures efficient fluid transfer and temperature regulation.
- Length: 9.13 inches for precise fitment
- Hose color: Natural for easy identification
- End 1: Quick disconnect fitting with 0.53 inch inside diameter
- End 2: Hose barb fitting with 0.56 inch inside diameter
- Material: Combination of metal and rubber for flexibility and durability
- Maximum working pressure: 100 psi
- Operating temperature range: -40°F to 329°F
- Straight hose shape for straightforward installation
- Flexible design without internal spring
Durable Construction and Precise Fitment
This transmission oil cooler hose assembly combines metal and rubber materials to provide both strength and flexibility, accommodating the thermal expansion and vibrations common in heavy-duty trucks. The natural hose color allows for quick visual inspection during maintenance. The quick disconnect fitting on one end and hose barb on the other ensure secure connections to the transmission cooler lines, minimizing the risk of leaks. With a maximum working pressure of 100 psi and an operating temperature range from -40°F to 329°F, this hose assembly is built to withstand the harsh conditions experienced by Chevrolet Sierra 2500 HD, Sierra 3500, Silverado 2500 HD, and Silverado 3500 models.
Compatible Vehicles and Applications
- Chevrolet Sierra 2500 HD transmission oil cooler line replacement
- GMC Sierra 3500 automatic transmission cooling system repair
- Silverado 2500 HD transmission fluid cooler hose upgrade
- Silverado 3500 transmission oil cooler hose assembly replacement
Installation Notes and Tips
Ensure the vehicle is cool before beginning installation to avoid burns from hot transmission fluid. Verify that the hose length and fitting types match your vehicle’s specifications. Use appropriate tools to disconnect the quick disconnect fitting carefully to prevent damage. Inspect the hose barb end for a secure fit and clamp properly to avoid leaks. Regularly check the hose assembly for signs of wear or damage during routine maintenance.
Quality Assurance and Warranty
Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance for your transmission cooling system. While specific warranty details for part number 624-623 are not provided here, Dorman typically offers limited warranties covering defects in materials and workmanship. Consult the product packaging or Dorman’s official resources for exact warranty terms.
| Brand | Dorman |
|---|---|
| Part Number | 624-623 |
| Hose Color | Natural |
| Length | 9.13 |
| End 1 Type | Quick disconnect |
| End 2 Type | Hose barb |
| End 1 Inside Diameter | 0.53 |
| End 2 Inside Diameter | 0.56 |
| Contains Spring | No |
| Maximum Working Pressure | 100 |
| Hose Shape | Straight |
| Hose Material | Metal |
| Hose Material | Rubber |
| Flexible | Yes |
| Gasket or Seal Included | No |
| Maximum Operating Temperature (┬░F) | 329 deg. f |
| Minimum Operating Temperature (┬░F) | -40 deg. f |
| Package Contents | 1 transmission line |
This part fits 12 vehicles. Search below:
| Year | Make | Model | Transmission | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2003 | Chevrolet | Silverado 2500 HD | Automatic | 8.1L | V8 | Auxiliary Cooler to Radiator (Passenger Side) | ID Code KWD and KUD - compatible with Automatic Transmission Oil Cooler Hose Assemblies. |
| 2003 | Chevrolet | Silverado 3500 | Automatic | 8.1L | V8 | Auxiliary Cooler to Radiator (Passenger Side) | ID Code KWD and KUD - compatible with Automatic Transmission Oil Cooler Hose Assemblies. |
| 2003 | GMC | Sierra 2500 HD | Automatic | 8.1L | V8 | Auxiliary Cooler to Radiator (Passenger Side) | ID Code KWD and KUD - compatible with Automatic Transmission Oil Cooler Hose Assemblies. |
| 2003 | GMC | Sierra 3500 | Automatic | 8.1L | V8 | Auxiliary Cooler to Radiator (Passenger Side) | ID Code KWD and KUD - compatible with Automatic Transmission Oil Cooler Hose Assemblies. |
| 2002 | Chevrolet | Silverado 2500 HD | Automatic | 8.1L | V8 | Auxiliary Cooler to Radiator (Passenger Side) | ID Code KWD and KUD - compatible with Automatic Transmission Oil Cooler Hose Assemblies. |
| 2002 | Chevrolet | Silverado 3500 | Automatic | 8.1L | V8 | Auxiliary Cooler to Radiator (Passenger Side) | ID Code KWD and KUD - compatible with Automatic Transmission Oil Cooler Hose Assemblies. |
| 2002 | GMC | Sierra 2500 HD | Automatic | 8.1L | V8 | Auxiliary Cooler to Radiator (Passenger Side) | ID Code KWD and KUD - compatible with Automatic Transmission Oil Cooler Hose Assemblies. |
| 2002 | GMC | Sierra 3500 | Automatic | 8.1L | V8 | Auxiliary Cooler to Radiator (Passenger Side) | ID Code KWD and KUD - compatible with Automatic Transmission Oil Cooler Hose Assemblies. |
| 2001 | Chevrolet | Silverado 2500 HD | Automatic | 8.1L | V8 | Auxiliary Cooler to Radiator (Passenger Side) | ID Code KWD and KUD - compatible with Automatic Transmission Oil Cooler Hose Assemblies. |
| 2001 | Chevrolet | Silverado 3500 | Automatic | 8.1L | V8 | Auxiliary Cooler to Radiator (Passenger Side) | ID Code KWD and KUD - compatible with Automatic Transmission Oil Cooler Hose Assemblies. |
| 2001 | GMC | Sierra 2500 HD | Automatic | 8.1L | V8 | Auxiliary Cooler to Radiator (Passenger Side) | ID Code KWD and KUD - compatible with Automatic Transmission Oil Cooler Hose Assemblies. |
| 2001 | GMC | Sierra 3500 | Automatic | 8.1L | V8 | Auxiliary Cooler to Radiator (Passenger Side) | ID Code KWD and KUD - compatible with Automatic Transmission Oil Cooler Hose Assemblies. |
* 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.