GMC

GMC Suspension Parts – Professional Grade Performance for America’s Trucks

Engineered Suspension Solutions for GMC Trucks

GMC has built its reputation on delivering professional-grade trucks that blend capability with refinement. From vintage C-series pickups to modern Sierra platforms, these workhorses demand suspension components that can handle serious payloads while maintaining the ride quality GMC owners expect. GMC suspension parts from Aldan American deliver the adjustability and durability required for trucks that work hard and drive well.

Whether you’re restoring a classic C10, building a lowered street truck, or upgrading a modern Sierra for improved handling, our GMC suspension kits provide bolt-on solutions engineered specifically for GMC chassis platforms. Our truck-specific coilover systems account for their unique weight distribution, frame geometry, and suspension architecture that define GMC trucks across generations.

GMC Model Coverage

Our vehicle-specific coilover kits span GMC’s most popular truck platforms:

Classic Truck Platforms (1963-1987)

C10 & C15 Series

• Short bed and long bed configurations across all model years
• Standard cab, crew cab, and extended cab applications
• Complete coilover conversion kits for older straight-axle suspensions
• Tubular control arm packages that modernize geometry

R10 & R1500 Series

• 4WD platform-specific suspension solutions
• Engineered to accommodate four-wheel-drive components
• Maintains factory ride height capabilities with adjustability

Sprint & Caballero

• Car-based truck platforms sharing A-body and G-body architecture
• Front and rear coilover systems for improved handling
• Perfect for lowered street truck builds and performance applications

Jimmy & C1500 Suburban

• SUV and Suburban-specific suspension packages
• Accommodates additional weight of extended wheelbase and passenger configurations
• Spring rates calculated for heavier vehicle weights

Modern Independent Front Suspension (1988-1998)

C1500 (OBS Sierra)

• Direct bolt-on coilover replacements for independent front suspension
• Front coilover kits and rear shock packages
• Designed for standard cab, extended cab, and crew cab models
• Compatible with factory control arms for straightforward installation

S15 & Sonoma

• Compact truck suspension systems
• Lower spring rates appropriate for lighter chassis weights
• Ideal for street truck builds and daily drivers

Contemporary Platforms (1999-Present)

Sierra & Sierra 1500 (GMT800/GMT900)

• 1999-2006 GMT800 platform applications
• 2007-2018 GMT900 platform solutions
• Engineered spring rates for modern truck weights and capabilities
• Front coilover systems with rear shock upgrades
• Bolt-on installation using factory mounting points
• Compatible with stock control arms

Each application receives suspension components engineered for that specific chassis, ensuring proper spring rates, correct mounting geometry, and appropriate damping characteristics matched to actual truck weight and use.

Professional-Grade GMC Suspension Technology

GMC’s “Professional Grade” philosophy extends to how these trucks are used.  They’re expected to perform reliably whether hauling materials to a job site or cruising comfortably on weekend trips. GMC suspension from Aldan American meets these dual demands through adjustable coilover technology that adapts to different driving conditions.

Adjustable Coilover Systems

Our coilover kits for GMC trucks feature threaded spring perches providing up to 2 inches of ride height adjustment. This range allows you to achieve the stance you want – from mild lowering that maintains practical ground clearance to more aggressive drops for show truck aesthetics – while keeping suspension geometry within functional parameters.

Single-adjustable coilovers offer 11 points of rebound damping adjustment, letting you tune how the suspension responds to bumps and road irregularities. Firmer settings reduce body motion and improve handling response, while softer settings prioritize ride comfort during daily driving.

Double-adjustable systems expand tuning capability through independent rebound and compression control with 66 adjustment points total. This proves valuable for trucks that see varied use because you can optimize settings for empty highway cruising, then retune for hauling heavy loads or for canyon driving.

American Manufacturing Excellence

Every Aldan American coilover and shock is manufactured in our Southern California facility using aerospace-grade 6061-T6 billet aluminum. This material choice delivers significant advantages for truck applications where weight and heat management matter.

Aluminum shock bodies weigh substantially less than steel equivalents, reducing unsprung mass that the suspension must control. Lower unsprung weight improves tire contact with the road surface, enhancing both ride quality and handling precision.

The superior thermal conductivity of aluminum becomes critical during aggressive driving or repeated load cycles. As shock absorbers work, they generate heat that can affect damping consistency. Aluminum dissipates this heat far more effectively than steel, maintaining predictable performance even under demanding conditions.

Complete GMC Suspension Solutions

Aldan American suspension packages deliver comprehensive front and rear upgrades in matched sets. Rather than piecing together components individually, complete packages ensure that spring rates and damping characteristics work together as an integrated system.

Package Contents:

• Front coilover assemblies (pair)
• Rear shock absorbers or coilovers depending on application
• All necessary mounting hardware
• Installation instructions
• Adjustable spanner wrench for ride height adjustment

For older GMC trucks requiring conversion from traditional springs to coilover systems, our kits include tubular control arms and all required brackets for complete bolt-on installation. These conversions update vintage suspension geometry while maintaining classic truck aesthetics.

Application-Specific Engineering

GMC trucks span multiple generations with different suspension architectures requiring specific solutions. Early C-series trucks used straight-axle front suspension that benefits from complete coilover conversion systems. Later independent front suspension models accept direct coilover replacements using factory mounting points.

Our engineering team calculates appropriate spring rates based on actual truck weights, cab configurations, and intended use. A short-bed standard cab truck requires different spring rates than an extended cab long-bed model due to significant weight distribution differences.

Browse our complete selection of suspension products to find components matched to your specific GMC model and performance objectives. Our coil-over shocks are available in multiple series offering different adjustment levels and performance characteristics.