2021 GMC Sierra 3500 HD Suspension Parts

Essential 2021 GMC Sierra 3500 HD Suspension Parts

Timbren SES – Rubber Spring, Frame Mount, 8,000 Lb Weight Capacity Per Set, Aeon Hollow Rubber (Part No.GMRTT35D)

Rubber Spring, Frame Mount, 8,000 Lb Weight Capacity Per Set, Aeon Hollow Rubber

from

$454.99
Timbren suspension enhancement system – The decision is easy, Timbren suspension kits (SES kits) are designed to enhance the suspension of your vehicle. Improve load handling haul heavy loads with ease eliminate sag and sway.

Product Features:
  • Eliminate Suspension Sag: When Towing A Heavy Trailer, Timbren SES Extends The Life Of The Suspension Of Your Vehicle And Helps To Avoid Bottoming Out
  • Control Trailer Sway, A Condition Which Occurs With Unbalanced Loads, In Crosswinds Or When Passing Heavy Trucks Timbren SES Stabilizes Your Vehicle
  • Control Body Roll, During Cornering With Powerful Progressive Rate Rubber Springs Which Resist Lean And Enhance Vehicle Stability
  • Improve The Ride, By Allowing The Aeon(R) Rubber Springs Absorb Road Shocks And Bumps. Towing A Trailer Doesnt Have To Mean Poor Ride Quality
  • Economical And Trouble Free
  • Simple And Easy To Install
See More

Timbren SES – Rubber Spring, Frame Mount, 8,000 Lb Weight Capacity Per Set, Aeon Hollow Rubber (Part No.GMFK25D)

Rubber Spring, Frame Mount, 8,000 Lb Weight Capacity Per Set, Aeon Hollow Rubber

from

$306.99
Timbren has a full line of suspension enhancement systems for the tow vehicle. For those spacing a new trailer

Product Features:
  • Eliminate Suspension Sag: When Towing A Heavy Trailer, Timbren SES Extends The Life Of The Suspension Of Your Vehicle And Helps To Avoid Bottoming Out
  • Control Trailer Sway, A Condition Which Occurs With Unbalanced Loads, In Crosswinds Or When Passing Heavy Trucks Timbren SES Stabilizes Your Vehicle
  • Control Body Roll, During Cornering With Powerful Progressive Rate Rubber Springs Which Resist Lean And Enhance Vehicle Stability
  • Improve The Ride, By Allowing The Aeon(R) Rubber Springs Absorb Road Shocks And Bumps. Towing A Trailer Doesnt Have To Mean Poor Ride Quality
  • Simple And Easy To Install
See More

Timbren SES – Rubber Spring, Frame Mount, 8,000 Lb Weight Capacity Per Set, Aeon Hollow Rubber (Part No.GMRTT35S)

Rubber Spring, Frame Mount, 8,000 Lb Weight Capacity Per Set, Aeon Hollow Rubber

from

$454.99
Timbren Suspension Enhancement System – The Decision is Easy…Timbren Suspension Kits (SES Kits) are designed to enhance the suspension of your vehicle. Improve load handling Haul heavy loads with ease Eliminate sag and sway

Product Features:
  • Eliminate Suspension Sag When Towing A Heavy Trailer Timbren SES Extends The Life Of The Suspension Of Your Vehicle And Helps To Avoid Bottoming Out
  • Control Trailer Sway A Condition Which Occurs With Unbalanced Loads In Crosswinds Or When Passing Heavy Trucks Timbren SES Stabilizes Your Vehicle
  • Control Body Roll During Cornering With Powerful Progressive Rate Rubber Springs Which Resist Lean And Enhance Vehicle Stability
  • Improve The Ride By Allowing The Aeon(R) Rubber Springs Absorb Road Shocks And Bumps. Towing A Trailer Doesnt Have To Mean Poor Ride Quality
  • Economical And Trouble Free
  • Simple And Easy To Install
See More

Firestone Ride-Rite – Air Spring, Frame Mount, 3200 To 5000 Pound Leveling Capacity (Part No.2249)

Air Spring, Frame Mount, 3200 To 5000 Pound Leveling Capacity

from

$519.99
Ride Rite(TM) air helper springs mount between the frame and the suspension of light trucks, vans, and motor homes. The heavy duty convoluted air springs will handle all leveling needs with load carrying capacities between 3200 to 5000 Pounds per set.

Product Features:
  • Level The Vehicle Front To Rear And Side To Side
  • Adjustability 5 To 100 PSI
  • Stabilize The Vehicle While Loaded
  • Maximize Vehicles Load Carrying Capacity
  • Everything Is Included For A Quick, Easy Installation. Brackets, Air Springs, Hardware, Air Line, And Separate Valves For Manual Inflation
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Firestone Ride-Rite – Air Spring, Frame Mount, 3200 To 5000 Pound Leveling Capacity (Part No.2613)

Air Spring, Frame Mount, 3200 To 5000 Pound Leveling Capacity

from

$637.99
Ride-Rite air springs utilize a pair of convoluted air springs, which can be adjusted for changing loads. These air springs are capable of 3,200 to 5,000 Pound of load leveling capacity. Ride-Rite air helper springs enhance the ride by reducing inter-leaf friction. Please remember that air springs do not increase the load carrying capacity of your vehicle. Ride-Rite air spring kits are installed between the frame of the vehicle and the suspension, providing load support through the use of air pressure. Ride-Rite air spring kits can be installed on most light trucks, motorhomes, RV’s, Suv and vans.

Product Features:
  • Enhances Safe Load-Carrying Capacity, Stability, Ride Quality And Brake Effectiveness
  • Most Kits Are No-Drill Systems
  • Each Product Goes Through Robust, Comprehensive Testing To Deliver Durability You Can Depend On
  • Comes With Everything For A Quick, Easy To Install
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Firestone Ride-Rite – Air Spring, Frame Mount, 7500 Lb Leveling Capacity, Adjustable From 5 To 100 Psi (Part No.2825)

Air Spring, Frame Mount, 7500 Lb Leveling Capacity, Adjustable From 5 To 100 Psi

from

$979.99
The Firestone Ride-Rite All-In-One Analog Kit, part, comes with everything you need to level off-center loads, increase ride quality and encourage road safety when hauling and towing. All-In-One kits save you from having to shop for individual parts and are more affordable than purchasing parts separately. Plus, Firestone All-In-One kit elements are designed for ultimate compatibility, so you enjoy the most streamlined product installation and performance. GMC/Chevrolet Firestone Ride-Rite All-In-One Analog Kits pair a Ride-Rite air helper spring kit with an air compressor in one easy-to-install package. The Ride-Rite kit uses air pressure to balance off-center loads, reduce stress on the suspension system and encourage vehicle confidence. Subsequently, your ride comfort is positively impacted.

Product Features:
  • Provides An Instant Air Source For The Air Helper Springs Or Accessories
  • No Drill Design
  • Easy To Install
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TrailFX – Leaf Spring Block Kit, 1 Inch Lift; Aluminum; With 2 Blocks/ 4 U-Bolts/ Hardware (Part No.G20RB1)

Leaf Spring Block Kit, 1 Inch Lift; Aluminum; With 2 Blocks/ 4 U-Bolts/ Hardware

from

$161.99
TrailFX has produced a line of leveling and rear block kits that are engineered to provide consumers with the very best in quality performance at an attractive price point. TrailFX suspension products allow you to level your vehicle or raise it for additional tire clearance, all while maintaining your factory ride.

Product Features:
  • Maintains Factory Ride
  • Allows For Rear Rake For Towing Or Hauling
  • Simple Installation
  • Limited Lifetime Warranty Against Defects In Design, Operation, Workmanship And Materials
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Firestone Ride-Rite – Double Bellows, 8.91"H Extended, 3"H Compressed, 7.52"Dia, 1/4" NPT Port, Single (Part No.6401)

Double Bellows, 8.91"H Extended, 3"H Compressed, 7.52"Dia, 1/4" NPT Port, Single

from

$201.99
Firestone heavy duty Ride Rite air helper springs are the workhorse of our air helper spring line. The double convoluted air springs offer maximum load support as well as years of worry free service. Ride Rite air helper springs can be installed on most light trucks, motor homes, RVs, SUVs and vans. Ride Rite air helper springs are installed between the frame of the vehicle and the suspension, providing load support through the use of air pressure. Firestone is committed to providing the customer with premium air helper spring kits. Ride Rite air helper springs have become synonymous with quality, durability, and customer support. Each application is specifically designed to maximize the safe load carrying capacity, stability, and ride quality of the vehicle. Ride Rite air helper springs utilize a pair of convoluted air springs which can be adjusted for changing loads. These air springs are capable of 3200 to 5000 Pounds of load leveling capacity. Ride Rite air helper springs enhance the ride by reducing inter leaf friction. Please remember that air springs do not increase the Load Carrying capacity of your vehicle. Ride Rite kits are application specific and are designed for hassle free fitment to the OEM suspension.

Product Features:
  • Keep The Vehicle Level Improves Steering Control And Braking Effectiveness, Levels Headlight Beams And Reduces Tire Wear
  • Level Off Center Loads, Individual Inflation Valves Allow For Adjustment Side To Side
  • Reduce Suspension Fatigue Keeps Leaf Springs From Permanent Sagging Under Repeated Or Constant Load
  • Reduce Bottoming Out Protective Air Cushion Softens Contact Between The Axle And Frame
  • Increase Vehicle Stability, Absorbs Road Shock, Providing Ideal Ride Conditions For Passengers And Load
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Firestone Ride-Rite – Double Bellows, 8.3"H Extended, 2.8"H Compressed, 6.6"Dia, 1/4" NPT Port, Single (Part No.6781)

Double Bellows, 8.3"H Extended, 2.8"H Compressed, 6.6"Dia, 1/4" NPT Port, Single

from

$203.99
Firestone heavy duty Ride Rite air helper springs are the workhorse of our air helper spring line. The double convoluted air springs offer maximum load support as well as years of worry free service. Ride Rite air helper springs can be installed on most light trucks, motor homes, RVs, SUVs and vans. Ride Rite air helper springs are installed between the frame of the vehicle and the suspension, providing load support through the use of air pressure. Firestone is committed to providing the customer with premium air helper spring kits. Ride Rite air helper springs have become synonymous with quality, durability, and customer support. Each application is specifically designed to maximize the safe load carrying capacity, stability, and ride quality of the vehicle. Ride Rite air helper springs utilize a pair of convoluted air springs which can be adjusted for changing loads. These air springs are capable of 3200 to 5000 Pounds of load leveling capacity. Ride Rite air helper springs enhance the ride by reducing inter leaf friction. Please remember that air springs do not increase the Load Carrying capacity of your vehicle. Ride Rite kits are application specific and are designed for hassle free fitment to the OEM suspension.

Product Features:
  • Keep The Vehicle Level Improves Steering Control And Braking Effectiveness, Levels Headlight Beams And Reduces Tire Wear
  • Level Off Center Loads, Individual Inflation Valves Allow For Adjustment Side To Side
  • Reduce Suspension Fatigue Keeps Leaf Springs From Permanent Sagging Under Repeated Or Constant Load
  • Reduce Bottoming Out Protective Air Cushion Softens Contact Between The Axle And Frame
  • Increase Vehicle Stability, Absorbs Road Shock, Providing Ideal Ride Conditions For Passengers And Load
  • Limited Lifetime Warranty
See More

KYB – High Pressure Monotube Gas Shock (Part No.565103)

High Pressure Monotube Gas Shock

from

$142.99
Tough conditions demand tough truck shocks. The large bore KYB MonoMax provides the additional stability that heavier, more powerful or high center of gravity vehicles demand. The KYB MonoMax is a heavy duty monotube shock absorber that provides the most handling, control and durability of any KYB shock; and its just for trucks. The MonoMaxs tough design automatically adjusts to driving conditions with fade-free performance. The KYB MonoMax has an outstanding reputation for vehicles that do real work, go off-road, tow a trailer or haul heavy loads. It uses a work-ready, zinc-coated steel piston ring and includes an off-road dust boot.

Product Features:
  • Maximum Performance Upgrade With Up To 40% More Damping Performance Than Standard Shock Absorbers
  • Perfect Solution When You Need To Upgrade Suspension Performance On Your Gm Truck
  • Truck Monotube Design Outperforms All Other Standard Shock Absorbers
  • Zinc-Coated, Stainless Steel Piston Ring Provides A Positive Seal In The Most Extreme Conditions
  • Rubber Boot To Protect The Shaft And Keep Dirt And Debris Away From The Seals
  • Engineered To Help Vehicles With Electronic Safety Systems (Esc, Abs, Etc.)
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Monroe – Reflex Light Truck Shock Absorber (Part No.911168)

Reflex Light Truck Shock Absorber

from

$74.99
Ideal for vehicles with a higher center of gravity, Monroe® Reflex® light truck shock absorbers feature ASD valving technology that automatically adjusts the unit to absorb the impact, helping to reduce vehicle roll and dive.

Product Features:
  • IMPROVES STABILITY — ASD (Acceleration Sensitive Damping) valving technology adjusts to impacts, reducing roll and dive for vehicles with a higher center of gravity
  • EXCEPTIONAL HANDLING — Full displaced valving, tuned specifically to each vehicle, adjusts to road extremes while the larger bore provides more efficient damping control to provide consistency and a smooth ride
  • CONSISTENT RIDE — OE all-weather fluid contains special additives to assist with extreme temperatures and help reduce oil breakdown while larger reserve tube holds more fluid to run cooler
  • CONTROL AND DURABILITY — Fluon-banded piston provides consistent sealing between piston and pressure tube for better control and increased durability
  • IMPROVES PERFORMANCE — Nitrogen gas charge maintains tire-to-road contact for improved ride and handling by reducing aeration
  • 2-1/4 inch or 2 inch Diameter Reserve Tube: Allows more fluid carrying capacity for a cooler running unit.
  • 1-3/8 inch Bore: Lower operating pressure than standard 1 inch bore units
  • 5/8 inch Piston Rod: Heavy-duty nitrocarburized rod for long service life. On non-dust shield units only
  • Special Seal: ‘Self-lubricating’ fluid seal designed to retain gas without excessive wear or friction.
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Monroe – Reflex Light Truck Shock Absorber (Part No.911303)

Reflex Light Truck Shock Absorber

from

$103.99
Ideal for vehicles with a higher center of gravity, Monroe® Reflex® light truck shock absorbers feature ASD valving technology that automatically adjusts the unit to absorb the impact, helping to reduce vehicle roll and dive.

Product Features:
  • IMPROVES STABILITY — ASD (Acceleration Sensitive Damping) valving technology adjusts to impacts, reducing roll and dive for vehicles with a higher center of gravity
  • EXCEPTIONAL HANDLING — Full displaced valving, tuned specifically to each vehicle, adjusts to road extremes while the larger bore provides more efficient damping control to provide consistency and a smooth ride
  • CONSISTENT RIDE — OE all-weather fluid contains special additives to assist with extreme temperatures and help reduce oil breakdown while larger reserve tube holds more fluid to run cooler
  • CONTROL AND DURABILITY — Fluon-banded piston provides consistent sealing between piston and pressure tube for better control and increased durability
  • IMPROVES PERFORMANCE — Nitrogen gas charge maintains tire-to-road contact for improved ride and handling by reducing aeration
  • 2-1/4 inch or 2 inch Diameter Reserve Tube: Allows more fluid carrying capacity for a cooler running unit.
  • 1-3/8 inch Bore: Lower operating pressure than standard 1 inch bore units
  • 5/8 inch Piston Rod: Heavy-duty nitrocarburized rod for long service life. On non-dust shield units only
  • Special Seal: ‘Self-lubricating’ fluid seal designed to retain gas without excessive wear or friction.
See More

KYB – High Pressure Monotube Gas Shock (Part No.KG54341)

High Pressure Monotube Gas Shock

from

$127.99
The Gas-a-just monotube shock absorber is available as an OE monotube replacement to restore your vehicles original capabilities. The KYB Gas-a-just has two separate working chambers: An air-free hydraulic piston and valve area for responsiveness and con

Product Features:
  • Adds Up To 25% More Damping Performance Over Original Equipment Shocks
  • Components And Valving Designed Specifically For Gm Trucks
  • Gas-A-Just Monotubes Include Additional Damping Over One Design For Vehicles That Work, Tow, And Have Larger, Heavier Tires & Wheels
  • High Pressure Monotube Design Separates The Gas And Oil For Fade Free Operation And Instant Response
  • Fluid Leaking Can Be A Cause Of Shock Failure, The KYB Gas-A-Just Has An Ultra-Smooth Triple Chrome Plated Chrome Piston Rod To Reduce Seal Wear
  • The Higher Gas Pressure Of The KYB Gas-A-Just Responds Quickly To Improve Steering Response
  • Electronic Safety Systems Depend On The Suspension, Brakes And Tires Operating As The Vehicle Manufacturer Intended. The KYB Gas-A-Just Helps Keep Electronic Safety Systems Performing As Designed.
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Valvoline – DEXRON®-VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart (Part No.822405)

DEXRON®-VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart

from

$14.49
Valvoline DEXRON®-VI ATF is a full-synthetic transmission fluid formulated with advanced additive technology to meet and exceed the requirements of the General Motors’ DEXRON®-VI specification. It is officially licensed and approved by GM and is fully back-serviceable and can be used wherever DEXRON®-II and/or DEXRON®-III are recommended. Recommended for use in the following applications: DEXRON®-VI, DEXRON®-III, DEXRON®-II, and Allison C-4.

Product Features:
  • Formulated with full-synthetic base stocks and advanced additive technology to meet the challenging demands of automatic transmissions.
  • Enhanced anti-shudder protection for smooth shifting and maximum power transfer
  • Developed with anti-wear technology to help improve transmission durability
  • Engineered with a proprietary blend of base oils and advanced additives to provide better oil flow at low temperatures and greater film protection at higher temperatures
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Royal Purple – Max Performance Synthetic Power Steering Fluid (Part No.01326)

Max Performance Synthetic Power Steering Fluid

from

$6.29
Max Performance Synthetic Power Steering Fluid

Valvoline – Transfer Case Fluid, 1 Quart (Part No.855459)

Transfer Case Fluid, 1 Quart

from

$14.99
Valvoline Multi-Vehicle Transfer Case Fluid is a full synthetic product meeting the performance needs for transfer cases recommending Ford XL-12 and GM Auto Trak II specifications or ATF fluids (DEX/MERC, ATF +4, etc).

Product Features:
  • Recommended for use in most Ford, GM and FCA (Dodge, Jeep) models
  • Formulated to help prevent gear wear and protect against rust and corrosion
  • Formulated to deliver enhanced protection against deposits
  • Helps provide better protection during extreme operating conditions
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Rancho – RS5000 Shock Absorber (Part No.RS5370)

RS5000 Shock Absorber

from

$70.99
The shock that started it all! Rancho® RS5000 series has been the shock of choice for light trucks and sport utility vehicles since 1985. Available for stock and lifted applications, RS5000 is ideal for on and off-road use, at an affordable price.

Product Features:
  • Ten-stage velocity sensitive valving – Provides tuning specific for each vehicle
  • 5/8-in. (16mm) diameter piston rod (select applications) – Adds strength and durability. Size varies by application.
  • 1 3/8-in. (35mm) diameter piston (select applications) – Ensures performance in any environment
  • Protective boot included – Protects the shock rod and oil seal
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Monroe – Gas-Magnum Shock Absorber (Part No.34810)

Gas-Magnum Shock Absorber

from

$124.99
Designed for midsize and full-size trucks and vans, Monroe® Gas-Magnum® shock absorbers provide firm control without a harsh ride. With up to twice the fluid capacity of standard 1-in. bore shocks, they work more efficiently with less effort.

Product Features:
  • DESIGNED FOR TRUCKS AND VANS — Engineered for hardworking full-size trucks and vans and features full-displaced valving on compression cycles to deliver controlled ride and handling
  • BUILT TO LAST — Heavy-duty nitrocarburized rod (non-dust shield units only) and sintered iron piston enhance durability for longer service life while self-lubricating fluid seal reduces friction against piston rod to reduce wear
  • CONSISTENT RIDE — OE all-weather fluid contains special modifiers to handle extreme temperatures and help reduce friction and ensure smooth rod reaction
  • IMPROVES PERFORMANCE — Nitrogen gas-charge maintains tire-to-road contact for improved ride and handling by reducing aeration and shock fade
  • LONGER SERVICE LIFE — Larger bore and bigger 2-in. reserve tube work together to hold more oil for greater capacity to allow the shock to work efficiently for controlled ride and longer service life
  • Nitrogen Gas Charged: For improved ride and handling, helps maintain tire to road contact by reducing aeration – on most applications
  • Sintered Iron Piston: Stronger than traditional metals, enhances durability for longer service life.
  • Special Seal: ‘Self-lubricating’ fluid seal designed to retain gas without excessive wear or friction.
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Rancho – RS5000X Shock Absorber (Part No.RS55288)

RS5000X Shock Absorber

from

$80.99
Featuring a unique, exclusive valving system and advanced compression functionality, Rancho® RS5000®X shocks deliver improved overall on- and off-road handling and performance.

Product Features:
  • IMPROVED HANDLING AND PERFORMANCE — Cross Tuned technology featuring exclusive rebound valving system and advanced compression phase improves overall handling and performance on and off road
  • MINIMIZES ROUGH RIDE — Exclusive Progressive Engagement Valving is custom-tuned for each vehicle to help reduce initial impacts at low speeds and minimizes a rough ride
  • STRONG AND DURABLE — Features a 16mm nitro-carburized piston rod to resist scuffs & corrosion, double-welded loops at stress areas, 35mm sintered iron piston for enhanced structural integrity and polyvinyl protective boot
  • HANDLES EXTREME TEMPERATURE CHANGES — Large twin-tube body filled with all-weather fluid allows for cooler operation, increased vehicle control and ability to withstand internal temperatures of -40 to 248°F
  • SMOOTH PERFORMANCE — Polyurethane rebound bumper and rubber bushings help absorb ride harshness while the fluon-banded piston enhances responsiveness to changing road conditions for an overall smoother ride
  • REDUCES FADE — Nitrogen gas pressurized to 150 PSI to minimize air-to-oil mixture to reduce damping performance fade and foaming
  • MAINTAINS VEHICLE CONTROL — Compression Control Valve is custom-tuned for each vehicle to regulate fluid transfer to absorb impacts without disc flutter and help maintain shock motion control
  • BUILT TO LAST — Low-friction, self-lubricating seal retains gas and oil for quicker rebound and smoother compression while the application-specific piston delivers heightened control of shock motion due to the expanded piston area
  • Rebound Bumper
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Rancho – RS5000X Shock Absorber (Part No.RS55378)

RS5000X Shock Absorber

from

$84.99
Featuring a unique, exclusive valving system and advanced compression functionality, Rancho® RS5000®X shocks deliver improved overall on- and off-road handling and performance.

Product Features:
  • IMPROVED HANDLING AND PERFORMANCE — Cross Tuned technology featuring exclusive rebound valving system and advanced compression phase improves overall handling and performance on and off road
  • MINIMIZES ROUGH RIDE — Exclusive Progressive Engagement Valving is custom-tuned for each vehicle to help reduce initial impacts at low speeds and minimizes a rough ride
  • STRONG AND DURABLE — Features a 16mm nitro-carburized piston rod to resist scuffs & corrosion, double-welded loops at stress areas, 35mm sintered iron piston for enhanced structural integrity and polyvinyl protective boot
  • HANDLES EXTREME TEMPERATURE CHANGES — Large twin-tube body filled with all-weather fluid allows for cooler operation, increased vehicle control and ability to withstand internal temperatures of -40 to 248°F
  • SMOOTH PERFORMANCE — Polyurethane rebound bumper and rubber bushings help absorb ride harshness while the fluon-banded piston enhances responsiveness to changing road conditions for an overall smoother ride
  • REDUCES FADE — Nitrogen gas pressurized to 150 PSI to minimize air-to-oil mixture to reduce damping performance fade and foaming
  • MAINTAINS VEHICLE CONTROL — Compression Control Valve is custom-tuned for each vehicle to regulate fluid transfer to absorb impacts without disc flutter and help maintain shock motion control
  • BUILT TO LAST — Low-friction, self-lubricating seal retains gas and oil for quicker rebound and smoother compression while the application-specific piston delivers heightened control of shock motion due to the expanded piston area
  • Rebound Bumper
See More

KYB – High Pressure Monotube Gas Shock (Part No.KG54340)

High Pressure Monotube Gas Shock

from

$81.99
The Gas-a-just monotube shock absorber is available as an OE monotube replacement to restore your vehicles original capabilities. The KYB Gas-a-just has two separate working chambers: An air-free hydraulic piston and valve area for responsiveness and con

Product Features:
  • Adds Up To 25% More Damping Performance Over Original Equipment Shocks
  • Components And Valving Designed Specifically For Gm Trucks
  • Gas-A-Just Monotubes Include Additional Damping Over One Design For Vehicles That Work, Tow, And Have Larger, Heavier Tires & Wheels
  • High Pressure Monotube Design Separates The Gas And Oil For Fade Free Operation And Instant Response
  • Fluid Leaking Can Be A Cause Of Shock Failure, The KYB Gas-A-Just Has An Ultra-Smooth Triple Chrome Plated Chrome Piston Rod To Reduce Seal Wear
  • The Higher Gas Pressure Of The KYB Gas-A-Just Responds Quickly To Improve Steering Response
  • Electronic Safety Systems Depend On The Suspension, Brakes And Tires Operating As The Vehicle Manufacturer Intended. The KYB Gas-A-Just Helps Keep Electronic Safety Systems Performing As Designed.
See More

Monroe – Reflex Light Truck Shock Absorber (Part No.911181)

Reflex Light Truck Shock Absorber

from

$94.99
Ideal for vehicles with a higher center of gravity, Monroe® Reflex® light truck shock absorbers feature ASD valving technology that automatically adjusts the unit to absorb the impact, helping to reduce vehicle roll and dive.

Product Features:
  • IMPROVES STABILITY — ASD (Acceleration Sensitive Damping) valving technology adjusts to impacts, reducing roll and dive for vehicles with a higher center of gravity
  • EXCEPTIONAL HANDLING — Full displaced valving, tuned specifically to each vehicle, adjusts to road extremes while the larger bore provides more efficient damping control to provide consistency and a smooth ride
  • CONSISTENT RIDE — OE all-weather fluid contains special additives to assist with extreme temperatures and help reduce oil breakdown while larger reserve tube holds more fluid to run cooler
  • CONTROL AND DURABILITY — Fluon-banded piston provides consistent sealing between piston and pressure tube for better control and increased durability
  • IMPROVES PERFORMANCE — Nitrogen gas charge maintains tire-to-road contact for improved ride and handling by reducing aeration
  • 2-1/4 inch or 2 inch Diameter Reserve Tube: Allows more fluid carrying capacity for a cooler running unit.
  • 1-3/8 inch Bore: Lower operating pressure than standard 1 inch bore units
  • 5/8 inch Piston Rod: Heavy-duty nitrocarburized rod for long service life. On non-dust shield units only
  • Special Seal: ‘Self-lubricating’ fluid seal designed to retain gas without excessive wear or friction.
See More

Timbren SES – Rubber Spring, Inside Coil Spring Mount, 7000Lb Weight/Set, Aeon Hollow Rubber (Part No.GMRTT15S)

Rubber Spring, Inside Coil Spring Mount, 7000Lb Weight/Set, Aeon Hollow Rubber

from

$282.99
Timbren suspension enhancement system. The decision is easy, Timbren suspension kits (SES kits) are designed to enhance the suspension of your vehicle. Improve load handling haul heavy loads with ease eliminate sag and sway.

Product Features:
  • Eliminate Suspension Sag: When Towing A Heavy Trailer, Timbren SES Extends The Life Of The Suspension Of Your Vehicle And Helps To Avoid Bottoming Out
  • Control Trailer Sway, A Condition Which Occurs With Unbalanced Loads, In Crosswinds Or When Passing Heavy Trucks Timbren SES Stabilizes Your Vehicle
  • Control Body Roll, During Cornering With Powerful Progressive Rate Rubber Springs Which Resist Lean And Enhance Vehicle Stability
  • Improve The Ride, By Allowing The Aeon(R) Rubber Springs Absorb Road Shocks And Bumps. Towing A Trailer Doesnt Have To Mean Poor Ride Quality
  • Economical And Trouble Free
  • Simple And Easy To Install
See More

Timbren SES – Rubber Spring, Frame Mount, 8,600 Lb Weight Capacity Per Set, Aeon Hollow Rubber (Part No.GMRCK25D)

Rubber Spring, Frame Mount, 8,600 Lb Weight Capacity Per Set, Aeon Hollow Rubber

from

$306.99
Timbren has a full line of suspension enhancement systems for the tow vehicle. For those spacing a new trailer

Product Features:
  • Eliminate Suspension Sag: When Towing A Heavy Trailer, Timbren SES Extends The Life Of The Suspension Of Your Vehicle And Helps To Avoid Bottoming Out
  • Control Trailer Sway, A Condition Which Occurs With Unbalanced Loads, In Crosswinds Or When Passing Heavy Trucks Timbren SES Stabilizes Your Vehicle
  • Control Body Roll, During Cornering With Powerful Progressive Rate Rubber Springs Which Resist Lean And Enhance Vehicle Stability
  • Improve The Ride, By Allowing The Aeon(R) Rubber Springs Absorb Road Shocks And Bumps. Towing A Trailer Doesnt Have To Mean Poor Ride Quality
  • Simple And Easy To Install
See More

Timbren SES – Rubber Spring, Inside Coil Spring Mount, 14,000Lb, Aeon Hollow Rubber (Part No.GMFK25S)

Rubber Spring, Inside Coil Spring Mount, 14,000Lb, Aeon Hollow Rubber

from

$306.99
Timbren suspension enhancement system – The decision is easy, Timbren suspension kits (SES kits) are designed to enhance the suspension of your vehicle. Improve load handling haul heavy loads with ease eliminate sag and sway.

Product Features:
  • Eliminate Suspension Sag: When Towing A Heavy Trailer, Timbren SES Extends The Life Of The Suspension Of Your Vehicle And Helps To Avoid Bottoming Out
  • Control Trailer Sway, A Condition Which Occurs With Unbalanced Loads, In Crosswinds Or When Passing Heavy Trucks Timbren SES Stabilizes Your Vehicle
  • Control Body Roll, During Cornering With Powerful Progressive Rate Rubber Springs Which Resist Lean And Enhance Vehicle Stability
  • Improve The Ride, By Allowing The Aeon(R) Rubber Springs Absorb Road Shocks And Bumps. Towing A Trailer Doesnt Have To Mean Poor Ride Quality
  • Economical And Trouble Free
  • Simple And Easy To Install
See More

2021 GMC Sierra 3500 HD Suspension Parts

You count on your 2021 GMC Sierra 3500 HD to run right. That means taking care of it with regular maintenance, necessary repairs, and the right parts. Advance Auto Parts can help with all of that thanks to our extensive inventory of trusted Suspension Parts. With 26 Suspension Parts ranging in price from $6.29 to $979.99, you’re sure to find everything you need for your 2021 GMC Sierra 3500 HD.

Brands matter. If you want to shop a specific Suspension Parts brand, we stock 8 different brands like Valvoline, Monroe, and Rancho. 2021 GMC Sierra 3500 HD Suspension Parts start as low as $6.29!

One of the best ways to find top quality OEM or aftermarket Suspension Parts is by asking professionals. Short of that, you can shop with confidence thanks to our 117 extensive product reviews on 2021 GMC Sierra 3500 HD Suspension Parts.

Did we mention you can order your Suspension Parts from our online catalog and have them shipped right to your garage? Or, if you feel like seeing the parts first-hand, search for your nearest Advance Auto Parts location above and pick up in-store when you’re ready. Browse our full Suspension Parts inventory for your 2021 GMC Sierra 3500 HD below to get started!

Top-Rated Suspension Parts Brands For Your 2021 GMC Sierra 3500 HD

Trusted Suspension Parts OEM and aftermarket product brands are what Advance Auto Parts specializes in. The brands we work with are sure to keep that 2021 GMC Sierra 3500 HD running right for years to come. In our inventory you’ll find brands like Valvoline, Monroe, Rancho, and even more.

Popular Rancho Suspension Parts

You’ll find popular Rancho brand products across Shocks and Struts. All are waiting to get your 2021 GMC Sierra 3500 HD back on the road. Some of the top-rated Rancho products in these categories are:
RS5000X Shock Absorber
from $83.99
(1)
RS5000X Shock Absorber
Front Shock and Struts

Top-Rated Monroe Suspension Parts


If Monroe are what you’re looking for, our inventory holds plenty. We stock Monroe brand Suspension Parts for your 2021 GMC Sierra 3500 HD, and some of our most reviewed Monroe parts include:
Reflex Light Truck Shock Absorber
from $103.99
(5)
Reflex Light Truck Shock Absorber
Rear Shock and Struts
Gas-Magnum Shock Absorber
from $124.99
(2)
Gas-Magnum Shock Absorber
Front Shock and Struts
Gas-Magnum Shock Absorber
from $104.99
(2)
Gas-Magnum Shock Absorber
Rear Shock and Struts

FAQs for 2021 GMC Sierra 3500 HD Suspension Parts

What are the most purchased Suspension Parts for the 2021 GMC Sierra 3500 HD?

Out of 26 Suspension Parts for the 2021 GMC Sierra 3500 HD, the most popular in our inventory are:
DEXRON®-VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart
from $14.49
(2)
DEXRON®-VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart
Suspension Self-Leveling Unit Fluids
RS5000X Shock Absorber
from $83.99
This product is not rated
RS5000X Shock Absorber
Rear Shock and Struts
Reflex Light Truck Shock Absorber
from $143.99
(1)
Reflex Light Truck Shock Absorber
Front Shock and Struts