Overview
The Rancho RS55845 is a stock height front strut assembly for the 2019 through 2021 Chevrolet Silverado 1500 and GMC Sierra 1500. It does not fit Trail Boss and AT4 models.
The strut is a Rancho RS5000X Series unit with progressive engagement valving, a tuned compression control valve, a gas pressurized, enlarged 2-1/4-inch twin tube body, and a 16 mm nitro-carburized rod. Its piston is a 1-3/8-inch sintered iron design in a full-displaced 35 mm bore, and the body diameter is 2.75 inches.
The RS5000X struts use Cross Tuned technology. The rebound valving system and advanced compression functionality were designed to improve handling and performance on and off road.
Key features
- Front strut assembly at stock height
- Progressive engagement valving
- Tuned compression control valve
- Gas pressurized, enlarged 2-1/4-inch twin tube body
- 16 mm nitro-carburized rod and full-displaced 35 mm bore
- Rebound bumper, black natural rubber bushings and double-welded loops
- Glass-filled, Fluon banded piston and low-friction, self-lubricating seal
- Protective boot, Limited Lifetime Warranty and 90-day Performance Guarantee
Choosing a stock height strut
Stock height struts are sized for factory ride height. They suit a truck that sits at the height it left the factory with, and they are matched to the spring rate and suspension geometry of the trims they cover. Mixing trim-specific parts is a common cause of poor handling, so start by confirming the exact trim of the truck. Stock height is the baseline for this design and is easy to verify from the truck itself.
Front struts are often replaced in pairs, and a wheel alignment is normally needed after the job. Check the tires for uneven wear before installing, since worn components upstream can hide the true condition of the new strut. Keep the protective boot in place during installation so dirt does not reach the rod seal.
- Verify trim before ordering
- Match ride height to the factory setting
- Replace struts in pairs
- Schedule an alignment after installation
Specifications
| Brand | Rancho |
|---|---|
| Part number | RANRS55845 |
| Series | RS5000 Series Strut |
| Position | Front |
| Shock type | Lift strut |
| Lift or drop | None |
| Body diameter | 2.75 inches |
| Charge | Gas charged |
| Piston | 1-3/8-inch sintered iron |
| Rod | 16 mm nitro-carburized |
Vehicle fitment
It fits the 2019 through 2021 Chevrolet Silverado 1500 in the Custom, High Country, LT, LTZ, RST, SSV and WT versions, and the 2019 through 2021 GMC Sierra 1500 in the Base, Elevation, SLE and SLT versions.
It excludes Trail Boss and AT4 models. It does not fit 2018 or earlier models, 2022 and later models, or the Sierra 1500 Denali. Confirm fit for your vehicle’s year, model and trim before ordering.
What’s included
The package contains one front strut assembly with its protective boot. It comes with the Limited Lifetime Warranty.
