OE Quality
60-Day Returns

Dorman 624-434 Automatic Transmission Oil Cooler Hose Assembly - Auxiliary Cooler to Radiator (Passenger Side)
Reliable Automatic Transmission Oil Cooler Hose Assembly
The Dorman 624-434 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: 9.06 inches for precise fitment
- Hose color: Natural for easy identification
- Ends: Quick disconnect fittings on both sides for fast and secure installation
- Inside diameter of End 1: 0.53 inches
- Material: Combination of metal and rubber for flexibility and durability
- Maximum working pressure: 100 psi
- Operating temperature range: -40°F to 329°F
- Hose shape: Straight design for straightforward routing
- Flexible construction 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 straight hose shape and quick disconnect fittings on both ends simplify installation and maintenance. Designed to withstand pressures up to 100 psi and temperatures ranging from -40°F to 329°F, this hose assembly maintains reliable performance under demanding operating conditions.
Compatible Vehicles and Applications
The Dorman 624-434 hose assembly is compatible with select Chevrolet and GMC heavy-duty trucks, including:
- Chevrolet Silverado 2500 HD
- Chevrolet Silverado 3500
- GMC Sierra 2500 HD
- GMC Sierra 3500
This part is specifically engineered to meet the transmission cooling needs of these models, ensuring proper fluid flow and temperature control within the transmission system.
Common Issues Addressed by This Hose Assembly
- Leaking or cracked transmission oil cooler hoses
- Reduced transmission cooling efficiency due to damaged hoses
- Transmission fluid contamination from hose failure
- Difficulty in hose removal or replacement due to lack of quick disconnect fittings
- Hose degradation from exposure to extreme temperatures and pressures
Installation Notes and Tips
When installing the Dorman 624-434 hose assembly, ensure the quick disconnect fittings are securely engaged to prevent leaks. Verify the hose routing matches the original configuration to avoid kinks or interference with other components. Inspect the transmission cooler and surrounding areas for debris or damage before installation. No gasket or seal is included, so reuse existing seals if applicable or source replacements as needed.
Quality Assurance and Warranty
Dorman parts are manufactured to meet or exceed OEM specifications, providing reliable performance for your Chevrolet Silverado 2500 HD, Silverado 3500, GMC Sierra 2500 HD, or Sierra 3500. While specific warranty details are not provided here, Dorman typically offers limited warranties covering defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.
| Brand | Dorman |
|---|---|
| Part Number | 624-434 |
| Hose Color | Natural |
| Length | 9.06 |
| End 1 Type | Quick disconnect |
| End 2 Type | Quick disconnect |
| End 1 Inside Diameter | 0.53 |
| 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 | Position | Notes |
|---|---|---|---|---|
| 2003 | Chevrolet | Silverado 2500 HD | Auxiliary Cooler to Radiator (Passenger Side) | ID Codes KTZ and KXJ |
| 2003 | Chevrolet | Silverado 3500 | Auxiliary Cooler to Radiator (Passenger Side) | ID Codes KTZ and KXJ |
| 2003 | GMC | Sierra 2500 HD | Auxiliary Cooler to Radiator (Passenger Side) | ID Codes KTZ and KXJ |
| 2003 | GMC | Sierra 3500 | Auxiliary Cooler to Radiator (Passenger Side) | ID Codes KTZ and KXJ |
| 2002 | Chevrolet | Silverado 2500 HD | Auxiliary Cooler to Radiator (Passenger Side) | ID Codes KTZ and KXJ |
| 2002 | Chevrolet | Silverado 3500 | Auxiliary Cooler to Radiator (Passenger Side) | ID Codes KTZ and KXJ |
| 2002 | GMC | Sierra 2500 HD | Auxiliary Cooler to Radiator (Passenger Side) | ID Codes KTZ and KXJ |
| 2002 | GMC | Sierra 3500 | Auxiliary Cooler to Radiator (Passenger Side) | ID Codes KTZ and KXJ |
| 2001 | Chevrolet | Silverado 2500 HD | Auxiliary Cooler to Radiator (Passenger Side) | ID Codes KTZ and KXJ |
| 2001 | Chevrolet | Silverado 3500 | Auxiliary Cooler to Radiator (Passenger Side) | ID Codes KTZ and KXJ |
| 2001 | GMC | Sierra 2500 HD | Auxiliary Cooler to Radiator (Passenger Side) | ID Codes KTZ and KXJ |
| 2001 | GMC | Sierra 3500 | Auxiliary Cooler to Radiator (Passenger Side) | ID Codes KTZ and KXJ |
* 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.