{"product_id":"kyb-5550040-suspension-shock-absorber-rear","title":"KYB 5550040 Suspension Shock Absorber - Rear","description":"\u003ch2\u003eKYB Gas-a-just Shock Absorber\u003c\/h2\u003e\u003cp\u003eThe KYB Gas-a-just shock absorber, part number 5550040, is a monotube suspension shock built for direct rear replacement applications. It is engineered for responsive control and consistent damping, with fitment for select Chevrolet Silverado 1500 and GMC Sierra 1500 trucks.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMonotube shock absorber design for responsive suspension control.\u003c\/li\u003e\n\u003cli\u003eSeparate hydraulic and high-pressure gas chambers for consistent performance.\u003c\/li\u003e\n\u003cli\u003eResists fade caused by aeration during repeated suspension movement.\u003c\/li\u003e\n\u003cli\u003eIncludes a dust cover for added protection.\u003c\/li\u003e\n\u003cli\u003eLower and upper E2 mounts: 14.6 x 42.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eKYB Gas-a-just shocks use an air-free hydraulic piston and valve area for immediate response, while a separate high-pressure nitrogen gas chamber adds performance on demand. That design helps maintain control without the fade associated with aeration in conventional twin-tube shocks. Part number 5550040 is specified for rear applications on 2019-2021 Chevrolet Silverado 1500, 2022 Chevrolet Silverado 1500 LTD, 2019-2021 GMC Sierra 1500, and 2022 GMC Sierra 1500 Limited. This part cross-references Monroe Shocks \u0026amp; Struts 552001 for the same application.\u003c\/p\u003e\u003ch2\u003eCommon Issues It Can Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eExcessive bounce after bumps or dips.\u003c\/li\u003e\n\u003cli\u003eReduced rear suspension control under load.\u003c\/li\u003e\n\u003cli\u003eInconsistent damping during repeated road impacts.\u003c\/li\u003e\n\u003cli\u003eWorn shock performance from age and mileage.\u003c\/li\u003e\n\u003cli\u003eLoss of ride stability on rough pavement.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify rear fitment by year, make, model, and notes before ordering. Confirm the compressed length, extended length, and mount style match the original shock absorber. Inspect surrounding suspension components for wear before installation, and follow the vehicle service procedure for proper torque and alignment.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eKYB is known for OE-style suspension engineering, and the Gas-a-just line is built around a monotube design that prioritizes control and consistent damping. Part number 5550040 is supported by the listed application data for the Silverado 1500 and Sierra 1500 platform.\u003c\/p\u003e","brand":"KYB","offers":[{"title":"Default Title","offer_id":53716165296309,"sku":"BFJG-5550040","price":81.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/KY_5550040_FRO.jpg?v=1794035234","url":"https:\/\/www.partcatalog.com\/products\/kyb-5550040-suspension-shock-absorber-rear","provider":"PartCatalog","version":"1.0","type":"link"}