/live/media/S5/S5_3402603_Fro.jpg)
Sunsong 3402603 Power Steering Pressure Line Hose Assembly - Pump To Hydroboost (Hydroboost End)
| Brand | Sunsong 3402603 |
|---|---|
| Position | Pump To Hydroboost (Hydroboost End) |
| Bracket (Y/N) | N |
| End 1 Fitting Size (mm) | 16 |
| End 1 Fitting Type | Female o-ring |
| End 2 Fitting Size (mm) | 18 |
| End 2 Fitting Type | Male o-ring |
| Hose Material 1 | Csm |
| Length (in) | 33.5 |
| Length (mm) | 850 |
| PS Switch Port (Y/N) | N |
| Tech Tip | Tt1000 |
| Fits | Cadillac · 17 vehicles |
Exact-fit assembly. Precision engineered to restore worn components to original condition.
Zinc-coated steel tubing. Helps resist corrosion and rust in harsh conditions.
Pressure-tested construction. Built to handle 1,500 psi working pressure with durable strength.
Cross-references Four Seasons 55188, 92269 and 365659 for the same application. See all 4.
Sunsong 3402603 Power Steering Pressure Line Hose
Sunsong 3402603 is a power steering pressure line hose assembly for select Cadillac applications with pump to hydroboost routing. It is built to meet demanding pressure requirements and is engineered for direct-fit replacement on Cadillac DTS, DeVille, and Seville models listed below.
Key Features
- Pressure hose assembly for the power steering system
- Max working pressure: 1,500 psi
- Burst pressure rating: 8,700 psi
- Tensile strength: 1,600 lb
- 16 mm female O-ring end and 18 mm male O-ring end
- 33.5 in. (850 mm) length
- High-grade steel tubing with zinc electroplating for corrosion resistance
- Precision-engineered for exact fit on the specified Cadillac applications
Detailed Description
This Sunsong power steering pressure line hose assembly is built for the pump to hydroboost connection and is engineered to restore proper hydraulic flow in the steering system. Part number 3402603 uses durable CSM hose material and corrosion-resistant steel tubing to handle heat, moisture, road salt, grime, and everyday underhood exposure. The hose is designed to match the original routing and connection style for a clean replacement on Cadillac DTS, DeVille, and Seville models.
This part cross-references Four Seasons 55188 for the same application.
Vehicle Fitment
- Fits 2006-2011 Cadillac DTS, Pump To Hydroboost (Hydroboost End)
- Fits 2000-2005 Cadillac DeVille, Pump To Hydroboost (Hydroboost End)
- Fits 2000-2004 Cadillac Seville, Pump To Hydroboost (Hydroboost End)
What It Helps Solve
- Power steering fluid leaks at the pressure line
- Loss of steering assist from a damaged hose
- Noise or vibration caused by restricted hydraulic flow
- Corrosion-related hose deterioration
- Improper fitment from a worn or incorrect replacement line
Installation Notes and Tips
Verify the end fittings before installation: 16 mm female O-ring on one end and 18 mm male O-ring on the other. Confirm the pump to hydroboost routing and compare the original hose length of 33.5 in. before removal. Inspect mating surfaces, seals, and adjacent steering components for wear or contamination so the new hose can seat correctly and maintain system pressure.
Quality Assurance
Each hose is pressure tested before it leaves the factory to help ensure proper operation after installation. Sunsong 3402603 is manufactured to exceed original equipment performance standards for pressure, burst strength, and durability.
| Year | Make | Model | Submodel | Position | Notes |
|---|---|---|---|---|---|
| 2011 | Cadillac | DTS | — | Pump To Hydroboost (Hydroboost End) | — |
| 2010 | Cadillac | DTS | — | Pump To Hydroboost (Hydroboost End) | — |
| 2009 | Cadillac | DTS | — | Pump To Hydroboost (Hydroboost End) | — |
| 2008 | Cadillac | DTS | — | Pump To Hydroboost (Hydroboost End) | — |
| 2007 | Cadillac | DTS | — | Pump To Hydroboost (Hydroboost End) | — |
| 2006 | Cadillac | DTS | Base | Pump To Hydroboost (Hydroboost End) | — |
| 2005 | Cadillac | DeVille | — | Pump To Hydroboost (Hydroboost End) | — |
| 2004 | Cadillac | DeVille | — | Pump To Hydroboost (Hydroboost End) | — |
| 2004 | Cadillac | Seville | SLS | Pump To Hydroboost (Hydroboost End) | — |
| 2003 | Cadillac | DeVille | — | Pump To Hydroboost (Hydroboost End) | — |
| 2003 | Cadillac | Seville | — | Pump To Hydroboost (Hydroboost End) | — |
| 2002 | Cadillac | DeVille | — | Pump To Hydroboost (Hydroboost End) | — |
| 2002 | Cadillac | Seville | — | Pump To Hydroboost (Hydroboost End) | — |
| 2001 | Cadillac | DeVille | — | Pump To Hydroboost (Hydroboost End) | — |
| 2001 | Cadillac | Seville | — | Pump To Hydroboost (Hydroboost End) | — |
| 2000 | Cadillac | DeVille | — | Pump To Hydroboost (Hydroboost End) | — |
| 2000 | Cadillac | Seville | — | Pump To Hydroboost (Hydroboost End) | — |
| No rows match your filter. | |||||