OE Quality
60-Day Returns

Sunsong 3402739 Power Steering Return Line Hose Assembly - Gear To Cooler
Overview of Sunsong Power Steering Return Line Hose Assembly
The Sunsong 3402739 power steering return line hose assembly is designed specifically for Hummer H3 and H3T models. This 20-inch hose features durable CSM material and precise fittings to ensure reliable fluid return in your vehicle's power steering system.
- Compatible with Hummer H3 and H3T power steering systems
- 20-inch (508 mm) length for exact fitment
- Constructed from CSM hose material for durability and flexibility
- End 1 fitting: 3/8 inch ID hose type
- End 2 fitting: 11 mm male captive o-ring
- No bracket included
- Part number 3402739 for accurate identification
Detailed Product Description
The Sunsong power steering return line hose assembly (part number 3402739) is engineered to meet the specifications required by Hummer H3 and H3T vehicles. The hose is made from chlorosulfonated polyethylene (CSM), a material known for its resistance to heat, oil, and abrasion, which is critical for maintaining the integrity of the power steering fluid return path. The assembly measures 20 inches (508 mm) in length, providing a precise fit without the need for modifications.
Fittings are designed for secure connections: one end features a 3/8 inch inside diameter hose fitting, while the other end has an 11 mm male captive o-ring fitting. This configuration ensures leak-free operation and compatibility with the original power steering components. The absence of a bracket means this hose is intended to be installed using existing mounting points on the vehicle.
Common Applications and Problem Resolution
- Replacement of worn or cracked power steering return hoses on Hummer H3 and H3T
- Eliminates power steering fluid leaks caused by damaged return lines
- Restores proper fluid flow to prevent steering system noise or stiffness
- Prevents contamination and maintains hydraulic pressure in the power steering system
- Addresses issues related to hose swelling or hardening due to age or heat exposure
Installation Notes and Tips
When installing the Sunsong 3402739 power steering return line hose assembly, ensure the vehicle is safely supported and the power steering system is depressurized. Verify that the hose length and fittings match the original equipment to avoid leaks or improper fitment. Use appropriate tools to secure the 3/8 inch ID hose end and the 11 mm male captive o-ring fitting. Inspect all connections for tightness and check for leaks after installation. Refer to technical tips TT1000, TT1001, and TT1002 for additional guidance.
Quality Assurance and Warranty
Sunsong power steering hoses are manufactured to meet or exceed OEM standards for durability and performance. The 3402739 hose assembly undergoes rigorous quality control to ensure reliable operation in Hummer H3 and H3T vehicles. While specific warranty details are not provided, Sunsong products typically come with a limited warranty against defects in materials and workmanship.
| Brand | Sunsong |
| Part Number | 3402739 |
| Bracket (Y/N) | N |
| End 1 Fitting Size (in) | 3/8 |
| End 1 Fitting Type | Id hose |
| End 2 Fitting Size (mm) | 11 |
| End 2 Fitting Type | Male captive o-ring |
| Hose Material 1 | Csm |
| Length (in) | 20 |
| Length (mm) | 508 |
| PS Switch Port (Y/N) | N |
| Tech Tip | Tt1000|tt1001|tt1002 |
This part fits 7 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2010 | Hummer | H3 | Gear To Cooler | w/ Left Hand Drive, w/ Finned Cooler |
| 2010 | Hummer | H3T | Gear To Cooler | w/ Left Hand Drive, w/ Finned Cooler |
| 2009 | Hummer | H3 | Gear To Cooler | w/ Left Hand Drive, w/ Finned Cooler |
| 2009 | Hummer | H3T | Gear To Cooler | w/ Left Hand Drive, w/ Finned Cooler |
| 2008 | Hummer | H3 | Gear To Cooler | w/ Left Hand Drive, w/ Finned Cooler |
| 2007 | Hummer | H3 | Gear To Cooler | w/ Left Hand Drive, w/ Finned Cooler |
| 2006 | Hummer | H3 | Gear To Cooler | w/ Left Hand Drive, w/ Finned Cooler |
* 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.