Smooth out every mile on and off pavement with the Rancho RS5000X shock absorber (RS55377), a direct-fit front replacement for the 2011-2025 Chevrolet Silverado 2500 HD, 2011-2025 Chevrolet Silverado 3500 HD, 2011-2025 GMC Sierra 2500 HD and 2011-2025 GMC Sierra 3500 HD. This Rancho shock absorber uses the brand's exclusive Cross Tuned technology to help improve overall handling and performance both on and off road.
- Cross Tuned technology: pairs an exclusive rebound valving system with an advanced compression phase, while Progressive Engagement Valving is custom-tuned for each vehicle to help reduce initial low-speed impacts and minimize a rough ride.
- Strong and durable build: 16mm nitro-carburized piston rod to resist scuffs and corrosion, double-welded loops at stress areas, a 35mm sintered iron piston and a polyvinyl protective boot.
- Handles temperature extremes: large twin-tube body filled with all-weather fluid for cooler operation, rated to withstand internal temperatures of -40 to 248°F.
- Reduces fade: nitrogen gas pressurized to 150 PSI to minimize the air-to-oil mixture and help reduce damping fade and foaming.
A vehicle-specific Compression Control Valve regulates fluid transfer to help maintain motion control, while a polyurethane rebound bumper, rubber bushings and a fluon-banded piston work to absorb ride harshness. A low-friction, self-lubricating seal retains gas and oil for quicker rebound and smoother compression. Backed by Rancho's Limited Lifetime Warranty. Sold individually; replacing both front shocks together as a matched pair is recommended for balanced ride control.
Interchange: 560646 · 560860 · 560864 · 560866 · 560976 · 560978 · 813027 · HD12140900 · 22990466 · 23315260 · G64148 · 22990462 · 22993218 · 22993219 · 23315258 · 23315259 · 9160521 · 345624 · 34810 · 72447 · 911447 · 76810 · RS5377 · 23155A
This part cross-references / interchanges with the following part numbers:
560646, 560860, 560864, 560866, 560976, 560978, 813027, HD12140900, 22990466, 23315260, G64148, 22990462, 22993218, 22993219, 23315258, 23315259, 9160521, 345624, 34810, 72447, 911447, 76810, RS5377, 23155A
Frequently Asked Questions
Will this Rancho shock absorber fit my truck?
It is a direct-fit front replacement for the 2011-2025 Chevrolet Silverado 2500 HD and 3500 HD and the 2011-2025 GMC Sierra 2500 HD and 3500 HD. Check the "Vehicles it fits" section to confirm your exact vehicle.
Is this a front or rear shock?
The catalog lists RS55377 as a front-position shock absorber for the covered applications.
What is Cross Tuned technology?
It is Rancho's exclusive setup combining a rebound valving system with an advanced compression phase, designed to help improve overall on- and off-road handling and performance.
Is this shock sold individually or as a pair?
It is sold individually. Replacing both front shocks together as a matched pair is recommended for even, balanced ride control.
Does the RS55377 come with a warranty?
Yes. It is backed by Rancho's Limited Lifetime Warranty.
