Pro-Series Helper Spring w/Silent Feature

The Pro-Series Helper Spring w/Silent Feature from HELLWIG is a premium add-a-leaf suspension upgrade engineered for GM fullsize trucks spanning 1967–2017 model years. This helper spring kit restores load-carrying capacity and improves ride quality when your truck frequently hauls cargo, tows trailers, or carries heavy payloads that compress the rear springs beyond their original design. Built for mechanics and truck owners who demand both performance and durability, this suspension component maintains stock ride height while eliminating the sag that degrades handling and accelerates wear on shocks and bushings.

Constructed from high-tensile steel with a silver powder-coat finish, the Pro-Series helper spring uses HELLWIG's proven add-a-leaf design that installs alongside existing factory springs without modification to mounting points. The silent feature eliminates the squeaking and noise common to helper springs by isolating vibration and spring-to-frame contact through precision engineering—a critical refinement that separates quality OEM-grade suspensions from budget alternatives that rattle and groan under load. The 56-pound unit measures 44.75 inches in length with a 9-inch width profile, delivering consistent spring rate across the rear axle to maintain predictable handling under varying payloads.

Mechanics and fleet operators benefit most from this helper spring when restoring ride height on worn suspension systems or upgrading work trucks that operate near GVWR regularly. Installation requires basic hand tools and suspension knowledge—no cutting, welding, or frame modification. The kit is compatible with factory leaf spring systems on Chevrolet, GMC, and other GM fullsize trucks in the supported model range. Professional installation is recommended to ensure proper alignment and spring seating, guaranteeing silent operation and maximum service life.