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Rancho RS55381 Shock Absorber - Rear
| Brand | Rancho RS55381 |
|---|---|
| Position | Rear |
| Compressed Bumper Stop | No |
| Compressed Length | 17.87 |
| Dust Shield Included | Yes |
| Extended Bumper Stop | Yes |
| Extended Hydraulic Lockout | No |
| Extended Length | 29.63 |
| Lower Mounting Code | LS47 |
| Lower Mounting Description | Loop Bushing & Sleeve Mount - 9/16" Sleeve ID X 1.5/8" Sleeve OAL |
| Parts Pack | None |
| Reserve Tube Diameter | 2.251 |
| Travel Length | 11.76 |
| Upper Mounting Code | LS47 |
| Upper Mounting Description | Loop Bushing & Sleeve Mount - 9/16" Sleeve ID X 1.5/8" Sleeve OAL |
| Product line | RS5000X |
| Fits | Chevrolet and GMC · 34 vehicles |
Exclusive valving system. Delivers more controlled handling and performance on and off the road.
Advanced compression functionality. Improves shock response for a smoother, more composed ride.
Dust shield included. Helps protect the shock from dirt and debris.
Cross-references RS5381 for the same application. See all 1.
Rancho RS5000X Rear Shock for HD Trucks
The Rancho RS5000X RS55381 is a rear suspension shock absorber built for heavy-duty Chevrolet Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 2500 HD, and Sierra 3500 HD applications with a Rancho Suspension System and 3.0-inch rear raised height. It uses Rancho’s RS5000X valving and compression control to improve on-road stability and off-road control.
For drivers searching for a rear shock for 2011-2019 Chevrolet Silverado 2500 HD or 2011-2018 GMC Sierra 3500 HD with a lifted rear setup, RS55381 provides a direct-fit solution matched to the listed suspension configuration.
RS5000X Product Line Details
Rancho RS5000X shocks are tuned for trucks that see mixed street and trail use. This line focuses on controlled compression response and consistent damping, helping maintain ride quality while supporting the added demands of raised-height suspension systems.
Key Features
- Part number RS55381 rear shock absorber
- Fits rear applications with Rancho Suspension System and 3.0-inch rear raised height
- RS5000X valving for improved handling response
- Advanced compression functionality for more controlled damping
- Dust shield included
- Extended bumper stop included
- Loop bushing and sleeve mounts at upper and lower ends
- Compressed length: 17.87 in; extended length: 29.63 in
- Travel length: 11.76 in
- Reserve tube diameter: 2.251 in
Detailed Description
Rancho RS55381 is a suspension shock absorber engineered for rear fitment on select Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD trucks. The RS5000X design uses a unique valving system and compression-focused tuning to help the shock respond more consistently to changing road surfaces, load transfer, and off-road movement. The loop bushing and sleeve mounting style at both ends supports the specified rear installation, while the included dust shield helps protect the shock body in demanding driving conditions.
This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. If you are replacing a rear shock on a 2011-2019 Chevrolet Silverado 2500 HD or a 2011-2018 GMC Sierra 3500 HD with the correct Rancho suspension setup, RS55381 is the listed match.
What It Helps Address
- Excessive rear bounce after bumps or dips
- Loose or unsettled rear-end feel on rough pavement
- Reduced control with a raised rear suspension
- Inconsistent damping during load changes
- Wear-related shock replacement on HD trucks
Installation Notes and Tips
- Compatible With rear positions only for the listed applications.
- Verify the truck has a Rancho Suspension System and 3.0-inch rear raised height before ordering.
- Upper and lower mounts use LS47 loop bushing and sleeve hardware geometry.
- Check compressed and extended length against the vehicle’s suspension travel before installation.
- Confirm clearance around the dust shield and bumper stop during final suspension inspection.
Quality Assurance
Rancho RS5000X shocks are built around application-specific valving and controlled compression performance for truck suspension use. RS55381 is cataloged for the listed Chevrolet Silverado and GMC Sierra HD rear applications, including 2011-2019 Chevrolet Silverado 2500 HD, 2011-2019 GMC Sierra 2500 HD, 2011-2018 Chevrolet Silverado 3500 HD, and 2011-2018 GMC Sierra 3500 HD.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2019 | Chevrolet | Silverado 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2019 | GMC | Sierra 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2018 | Chevrolet | Silverado 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2018 | Chevrolet | Silverado 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
| 2018 | GMC | Sierra 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2018 | GMC | Sierra 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
| 2017 | Chevrolet | Silverado 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2017 | Chevrolet | Silverado 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
| 2017 | GMC | Sierra 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2017 | GMC | Sierra 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
| 2016 | Chevrolet | Silverado 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2016 | Chevrolet | Silverado 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
| 2016 | GMC | Sierra 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2016 | GMC | Sierra 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
| 2015 | Chevrolet | Silverado 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2015 | Chevrolet | Silverado 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
| 2015 | GMC | Sierra 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2015 | GMC | Sierra 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
| 2014 | Chevrolet | Silverado 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2014 | Chevrolet | Silverado 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
| 2014 | GMC | Sierra 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2014 | GMC | Sierra 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
| 2013 | Chevrolet | Silverado 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2013 | Chevrolet | Silverado 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
| 2013 | GMC | Sierra 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2013 | GMC | Sierra 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
| 2012 | Chevrolet | Silverado 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2012 | Chevrolet | Silverado 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
| 2012 | GMC | Sierra 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2012 | GMC | Sierra 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
| 2011 | Chevrolet | Silverado 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2011 | Chevrolet | Silverado 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
| 2011 | GMC | Sierra 2500 HD | Rear | with Rancho Suspension System; with Rear Raised Height 3.0 (in); RS5000X |
| 2011 | GMC | Sierra 3500 HD | Rear | with Rear Raised Height 3.0 (in); RS5000X |
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