KYB 5640009 Suspension Strut - Front

KYB MonoMax Front Strut for Silverado and Sierra

The KYB MonoMax 5640009 is a heavy-duty front suspension strut for trucks that carry weight, tow, or see rough road use. It is built for 2019-2024 Chevrolet Silverado 1500 and 2019-2024 GMC Sierra 1500 models with a factory lift, giving these applications added control and stability.

Key Features

• Heavy-duty monotube construction for consistent damping response
• Large-bore design for added control on heavier, higher-center-of-gravity trucks
• Fade-resistant performance under repeated load and road stress
• Zinc-coated steel piston ring for work-focused durability
• Includes an off-road dust boot
• Internal rebound spring for controlled extension
• Front position application for lifted Silverado 1500 and Sierra 1500 models

Product Details

KYB MonoMax 5640009 is part of the MonoMax line, a KYB truck-focused suspension series built around monotube shock technology and load-aware damping behavior. This front strut uses a 16.81-inch compressed length, 20.49-inch extended length, and 3.68-inch stroke length, with lower mount type E3(100x128x10) and upper mount type S1(10MM). For buyers searching for a front strut for 2019-2024 Chevrolet Silverado 1500 with factory lift or a front strut for 2019-2024 GMC Sierra 1500 with factory lift, this part number 5640009 matches those listed applications. This part cross-references Monroe Shocks & Struts (e.g., 84535469, 84835356) for the same application.

What It Helps Address

• Excessive front-end bounce on lifted trucks
• Reduced control when towing or hauling heavy loads
• Harsh response over uneven pavement or off-road surfaces
• Premature damping fade during repeated suspension movement
• Front suspension instability on higher-riding truck setups

Installation Notes

Compatible With 2019-2024 Chevrolet Silverado 1500, front, w/ Factory Lift; MonoMax, and 2019-2024 GMC Sierra 1500, front, w/ Factory Lift; MonoMax. Verify mount style, lift configuration, and dimensions before installation. The dust cover is not included, and the internal rebound spring is included. Use the vehicle’s service information and torque specifications during installation of KYB 5640009.

Quality Assurance

KYB is known for suspension components used in demanding truck applications, and the MonoMax line is built around heavy-duty monotube construction for consistent control and durability in work-oriented use.