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KYB 346603 Suspension Shock Absorber - Rear
| Brand | KYB 346603 |
|---|---|
| Position | Rear |
| Compressed Length | 13.5 |
| Extended Length | 21.45 |
| Lower Mount Type | E2(14.45x42.6) |
| Upper Mount Type | E2(14.45x42.6) |
| Dust Cover Included | Y |
| Internal Rebound Spring | N |
| B-stop | N |
| R-stop | N |
| Fits | — |
OEA replacement. Restores original ride control, stability, and handling.
Twin-tube design. Nitrogen gas-charged for consistent damping performance.
Dust cover included. Helps protect the shock from road debris and wear.
Cross-references General Motors 12100534, General Motors 15185643 and General Motors 15185644 for the same application. See all 5.
KYB Excel-G Shock Absorber for OE Ride Control
KYB Excel-G Part Number 346603 is a nitrogen gas-charged, twin-tube suspension shock absorber built to restore original ride control, stability, stopping response, lane-change behavior, and handling. It is made on KYB OE assembly lines with OE-quality components and is calibrated for original performance rather than a changed ride feel.
Compatible With heavy-duty truck and commercial vehicle applications, this KYB Excel-G shock absorber is a direct-fit replacement choice for drivers and technicians who want factory-style damping and consistent suspension response. The Excel-G line is KYB’s OEA-style aftermarket offering, and 346603 is engineered to match the vehicle’s designed suspension behavior.
Key Features
- KYB recommended OEM replacement shock for heavy-duty trucks and commercial vehicles
- Restores designed control, handling, and steering response
- Triple-lip fluid seal helps reduce oil and gas leakage
- Vehicle-specific, hand-assembled damping valves manage tire contact and body movement
- Strong strut body and bracket construction helps minimize flex and maintain alignment
- Dust cover included
- Made in USA
Excel-G Product Line Details
The KYB Excel-G line is focused on restoring original suspension performance. It uses OE-quality components and KYB’s twin-tube, nitrogen gas-charged design to deliver controlled damping for everyday driving and work-duty use. For buyers searching KYB 346603, Excel-G shock absorber, or KYB shock absorber for heavy-duty truck and commercial vehicle suspension repair, this part is built around factory-style ride characteristics.
This part cross-references Monroe Shocks & Struts 65172 for the same application.
Common Issues This Shock Absorber Can Address
- Excessive bouncing after bumps or dips
- Loose or unstable steering feel
- Reduced tire contact during braking and cornering
- Uneven body motion during lane changes or load shifts
- Suspension noise or fluid leakage from a worn shock absorber
Installation Notes and Fitment Tips
Fits 2006-2011 GMC Sierra 2500 HD, rear; 2006-2011 GMC Sierra 3500 HD, rear; 2006-2011 Chevrolet Silverado 2500 HD, rear; 2006-2011 Chevrolet Silverado 3500 HD, rear. Verify compressed length 13.5 in., extended length 21.45 in., and upper/lower E2 mount dimensions before installation. Confirm the mounting style and suspension configuration on the vehicle before ordering. Part number 346603 is commonly searched for GMC Sierra 2500 HD shock absorber, Chevrolet Silverado 3500 HD rear shock, and KYB Excel-G replacement shock applications.
Quality Assurance
KYB supplies shocks and struts to new vehicle manufacturers, and the Excel-G line is produced on the same OE assembly lines using OE-quality components. The design focus is restoring original suspension performance and maintaining consistent control for the vehicle’s braking, steering, and stability systems.
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