ZONFANT Control Arm Bumpers Front Lower Suspension — Pack of 2, OEM-fit K201426, Reduces Noise & Impact

ZONFANT Control Arm Bumpers are a pair of durable rubber stops designed to replace worn front lower suspension bump stops and help prevent metal-to-metal contact on compatible Chevy, GMC, and Cadillac trucks and SUVs.

If your truck or SUV thumps over big bumps, rattles on rough roads, or shows signs of premature tire wear, the front lower control arm bumpers may be worn or missing. These ZONFANT bumpers are sold as a set of two and made to match original-equipment dimensions for direct replacement of part numbers K201426, K201426B, and KR1426. They sit between the control arm and frame to cushion travel and reduce harsh impacts, restoring quieter, smoother suspension action without altering ride height or steering geometry.

How will these bumpers change ride feel and noise?

Replacing degraded bumpers with new rubber stops reduces the bottoming-out sensation and cuts down clunks when the suspension reaches full travel. You’ll notice fewer metal-on-metal contacts and a calmer, less noisy cabin over potholes and sharp dips.

• Softens hard impacts at full suspension travel
• Reduces rattles and clunks from control arm contact
• Helps preserve suspension and frame mounting points

Which vehicles are these ZONFANT bumpers compatible with?

These control arm bumper stops are matched to the listed OEM numbers and fit a range of late-1990s through early-2010s Chevrolet, GMC, and Cadillac models. Confirm fitment against your vehicle VIN or existing part number before ordering to ensure exact compatibility.

• Cadillac Escalade: 1999–2000
• Chevrolet: Avalanche 2500 (2002–2006), Silverado 1500/2500/3500 variants (1999–2013), Suburban 2500 (2000–2013), Tahoe (1995–2000)
• GMC: Sierra 1500/2500/3500 series (1999–2010), Yukon and Yukon XL 2500 (1995–2013)

What are the construction and installation details?

The ZONFANT bumpers are molded from corrosion-resistant, dust-proof rubber compounds sized to replicate OEM stops. They are intended for direct swap-in replacement with minimal tools; installation typically requires lowering the control arm enough to seat the bumper, then securing it in place per factory torque specs.

• Sold as a pack of two front lower control arm bumpers
• Materials resist corrosion and road grime
• Direct replacement for K201426, K201426B, KR1426—no modification needed

When should I replace these bumpers and what symptoms indicate failure?

Replace the bumpers if you hear clunks, notice harsher impacts on big bumps, or if visual inspection shows cracks, missing rubber, or flattened stops. Ignoring failed bumpers can let the control arm strike the frame, resulting in increased wear and possible damage to suspension components.

• Signs: repeated clunking, bottoming-out, unusual tire wear
• Inspect during routine suspension checks or when replacing bushings/ball joints
• Replacement helps protect control arms and frame contact points

Who this is for: These ZONFANT front lower control arm bumper stops are aimed at owners and technicians working on compatible Chevrolet, GMC, and Cadillac trucks/SUVs who want an affordable, OEM-sized replacement to restore suspension cushioning. They suit DIY mechanics with basic suspension tools and professional shops performing routine front end or suspension repairs. Always confirm part compatibility with your vehicle’s year and model before purchase.