Dorman 929-129 Leaf Spring - Rear

Durable Leaf Spring Assembly for Chevrolet and GMC Trucks

The Dorman 929-129 leaf spring assembly is engineered to provide reliable suspension support for Chevrolet Silverado 3500 and GMC Sierra 3500 models. Constructed from high-quality steel with a standard suspension grade, this leaf spring assembly ensures consistent performance and durability.

Key Features of the Dorman 929-129 Leaf Spring Assembly

• Material: Heavy-duty steel construction for strength and longevity
• Color: Black finish for corrosion resistance
• Leaf Quantity: 4 leaves with a 2.5-inch width each
• Standard suspension grade designed for everyday use
• Includes bushings for smooth operation and reduced wear
• Berlin eye attachments on both ends for secure mounting
• No axle modification required for installation
• Pack thickness of 2.89 inches and leaf spring arch length of 7.25 inches
• Length: 32 inches on both axis 1 and axis 2

Detailed Description of the Dorman 929-129 Leaf Spring Assembly

This leaf spring assembly is designed specifically for the Chevrolet Silverado 3500 and GMC Sierra 3500, providing a direct replacement that maintains the original suspension geometry. The four-leaf design with a 2.5-inch width balances load capacity and ride comfort. Finished in black, the steel construction resists corrosion and wear over time. The inclusion of bushings helps reduce noise and vibration, while the Berlin eye attachments on both ends ensure a secure fit without the need for axle modifications. With a pack thickness of 2.89 inches and a spring arch length of 7.25 inches, this assembly meets the specifications required for standard suspension performance.

Common Applications and Issues Addressed

• Restores proper suspension height and alignment on Chevrolet Silverado 3500 and GMC Sierra 3500 trucks
• Replaces worn or broken leaf springs causing sagging or uneven ride height
• Improves load carrying capacity and vehicle stability under heavy loads
• Eliminates excessive noise and vibration from damaged or degraded springs
• Addresses suspension issues without requiring axle modifications

Installation Notes and Tips

The Dorman 929-129 leaf spring assembly is designed for straightforward installation on compatible Chevrolet Silverado 3500 and GMC Sierra 3500 models. Since no axle modification is needed, it can be installed using existing mounting points. Bushings are included to facilitate smooth operation, but mounting hardware is not included and should be sourced separately. It is recommended to inspect all suspension components during installation and replace any worn hardware to ensure optimal performance and safety.

Quality Assurance and Warranty Information

Dorman manufactures this leaf spring assembly to meet or exceed OEM standards for durability and fitment. The steel construction and corrosion-resistant finish contribute to long service life. While specific warranty details are not provided here, Dorman typically offers limited warranties on suspension components. For exact warranty terms, consult the product documentation or manufacturer resources.