GMC Brigadier Truck Leaf Springs, Hangers & Acc.

Frequently Asked Questions About GMC Brigadier Truck Leaf Springs, Hangers & Acc.

What years and models of GMC Brigadier are these leaf springs compatible with?

Our GMC Brigadier leaf springs are designed to fit models from 1978 through 1988. However, compatibility can vary based on specific configurations such as single or tandem axle setups, GVW ratings, and whether your truck has air ride or spring suspension. We recommend checking your VIN plate for the exact suspension code or calling our technical support team with your truck's specifications to ensure proper fitment.

What is the weight capacity and how do I choose the right leaf spring for my load requirements?

GMC Brigadier leaf springs typically range from 12,000 to 23,000 pound capacity per axle, depending on the number of leaves and thickness. To select the right spring, consider your typical payload weight plus the truck's empty weight. For heavy-duty applications or frequent maximum loads, choose a spring rated at least 20% above your regular operating weight. Multi-leaf packs (5-7 leaves) provide better load distribution than fewer, thicker leaves.

Do I need special tools or professional installation for leaf springs and hangers?

While basic mechanical skills are helpful, leaf spring replacement requires specific tools including a heavy-duty jack, jack stands rated for commercial trucks, spring compressors, and torque wrenches capable of 300+ ft-lbs. The job typically takes 4-6 hours per axle. Critical safety concerns include proper support of the axle during removal and ensuring correct U-bolt torque specifications (usually 200-250 ft-lbs). Many customers choose professional installation due to safety considerations and the need for proper alignment afterward.

What's the difference between OEM-style and heavy-duty aftermarket leaf springs?

OEM-style springs match original factory specifications and ride characteristics, making them ideal for standard applications. Heavy-duty aftermarket options typically feature additional leaves, shot-peened surfaces for longevity, and upgraded steel alloys. These provide 15-25% more capacity but may result in a stiffer ride when unloaded. Heavy-duty springs often include greaseable pins and heavier gauge steel construction, extending service life by 30-40% in severe-duty applications.

How often should I inspect and maintain my leaf springs and what are the warning signs of wear?

Inspect leaf springs every 6 months or 25,000 miles for commercial use. Key warning signs include visible cracks, separated leaves, worn bushings causing clunking noises, sagging that causes uneven tire wear, and shiny wear marks indicating leaf-to-leaf contact. Check U-bolt torque annually and look for rust between leaves. Replace springs when you notice a 2-inch or greater sag compared to the opposite side, or if any leaves show cracks extending more than halfway across the leaf width.