Front Shock Absorber for 2011-2025 Chevrolet Silverado 2500 HD & More - Rancho RS55378

$90.99
Rancho Suspension Shock Absorber RS55378
Rancho Suspension Shock Absorber RS55378 - view 2
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Rancho Suspension Shock Absorber RS55378 - view 4
Rancho Suspension Shock Absorber RS55378
Rancho Suspension Shock Absorber RS55378 - view 2
Rancho Suspension Shock Absorber RS55378 - view 3
Rancho Suspension Shock Absorber RS55378 - view 4

Vehicles this part fits
    Part number: RS55378
    UPC: 039703007177
    Condition: New
    Weight: 6.70 LBS
    Item Package Quantity: 1
    $90.99
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    Rancho Suspension Shock Absorber P/N:RS55378
    Rancho Suspension Shock Absorber P/N:RS55378
    $90.99
    $90.99

    Smooth out the ride and keep body motion in check with the Rancho RS5000X shock absorber (RS55378), a front-position damper that drops in as a direct-fit replacement for the 2011-2025 Chevrolet Silverado 2500 HD and 3500 HD and the 2011-2025 GMC Sierra 2500 HD and 3500 HD. This Rancho absorber uses Rancho's exclusive Cross Tuned technology — a rebound valving system paired with an advanced compression phase — to help improve handling and performance on and off road.

    • Minimizes rough ride: Progressive Engagement Valving is custom-tuned per vehicle to help reduce initial low-speed impacts.
    • Strong and durable: 16mm nitro-carburized piston rod, double-welded loops at stress areas, a 35mm sintered iron piston, and a polyvinyl protective boot.
    • Handles temperature swings: a large twin-tube body filled with all-weather fluid rated to withstand internal temperatures of -40 to 248°F.
    • Reduces fade: nitrogen gas pressurized to 150 PSI helps minimize air-to-oil mixing that causes damping fade and foaming.

    A polyurethane rebound bumper, rubber bushings, and fluon-banded piston help absorb harshness, and a Compression Control Valve regulates fluid transfer to help maintain motion control. Backed by Rancho's Limited Lifetime Warranty.

    Interchange: RS5378 · 23155A

    This part cross-references / interchanges with the following part numbers:

    RS5378, 23155A

    Frequently Asked Questions

    Does this Rancho shock absorber fit my truck?

    It is listed as a front-position shock for the 2011-2025 Chevrolet Silverado 2500 HD and 3500 HD and the 2011-2025 GMC Sierra 2500 HD and 3500 HD. See the "Vehicles it fits" section to confirm your exact configuration.

    What is Cross Tuned technology?

    It's Rancho's exclusive rebound valving system combined with an advanced compression phase, designed to help improve overall handling and performance both on and off road.

    Should I replace shocks in pairs?

    This listing is for a single shock. Replacing both shocks on the same axle as a matched pair is a common best practice for balanced, even ride control.

    What are signs this shock may need replacing?

    Excessive bouncing, nose dive under braking, a harsh or unstable ride, or fluid leaking from the shock body can indicate a worn damper. Diagnose the cause before replacing.

    How is it built to last?

    It features a 16mm nitro-carburized piston rod to resist scuffs and corrosion, double-welded loops, a 35mm sintered iron piston, and a self-lubricating seal, and comes with Rancho's Limited Lifetime Warranty.

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