2016 GMC Sierra 3500 HD Leaf Helper Spring

Part Number: 136684-03300754

Notes: SuperSprings -- Rear; Self-Adjusting Suspension Stabilizing System; Provides 1650 lbs Additional Load Leveling Ability; Do Not Exceed GVWR; Incl. Poly Spring Pad; Leaf Spring Dimensions 47L x 3W x 0.447~Requires Mounting Kit PN [MXKT] ~Without Factory Top Overload Spring

Features:

• Requires no maintenance; Proudly made in the U.S.A.
• Adjustable Shackles Allow Installation To Suit Various Needs
• Works In Conjunction w/Original Equipment Leaf Spring Assembly
• Never Load Any Vehicle Beyond The Manufacturers GVWR
• Sold as a pair left and right
• Reduces Body Roll Up To 30 Pct Without Compromising Ride Quality
• Shot Peened To Relieve Spring Stress And Extend Product Life
• Provides 1650 Pounds Additional Load Leveling Ability
• SAE 5160H 51 Pct Alloy/60 Pct Carbon High Grade Steel
• Self Adjusting Suspension Stabilizing System
• Typical Installation Completed In Approximately One Hour

Part Number: 136684-03300767

Notes: SuperSprings -- Rear; Self-Adjusting Suspension Stabilizing System; Provides 2000 lbs Additional Load Leveling Ability; Do Not Exceed GVWR; Incl. Poly Spring Pad; Cab And Chassis Models Only~Leaf Spring Dimensions 50L x 3W x 0.558~Poly Spring Pad PN [PSP-19] Included~With Factory Top Overload

Features:

• Adjustable Shackles Allow Installation To Suit Various Needs
• Self Adjusting Suspension Stabilizing System
• Shot Peened To Relieve Spring Stress And Extend Product Life
• Works In Conjunction w/Original Equipment Leaf Spring Assembly
• SAE 5160H 51 Pct Alloy/60 Pct Carbon High Grade Steel
• Reduces Body Roll Up To 30 Pct Without Compromising Ride Quality
• Requires no maintenance; Proudly made in the U.S.A.
• Typical Installation Completed In Approximately One Hour
• Never Load Any Vehicle Beyond The Manufacturers GVWR
• Sold as a pair left and right
• Provides 2000 Pounds Additional Load Leveling Ability

Part Number: 136684-07400870

Notes: SuperSprings -- Rear; Self-Adjusting Suspension Stabilizing System; Provides 2000 lbs Additional Load Leveling Ability; Do Not Exceed GVWR; Incl. Poly Spring Pad; Leaf Spring Dimensions 51L x 3W x 1.12~May Be Used On Models Equipped With Top Overload Spring

Features:

• Reduces Body Roll Up To 30 Pct Without Compromising Ride Quality
• Self Adjusting Suspension Stabilizing System
• Proudly Made In The U.S.A.
• Never Load Any Vehicle Beyond The Manufacturers GVWR
• SAE 5160H 51 Pct Alloy/60 Pct Carbon High Grade Steel
• Works In Conjunction With Original Equipment Spring Pack
• Provides 3300 Pounds Of Load Leveling Ability
• Requires No Maintenance
• Shot Peened To Relieve Spring Stress And Extend Product Life
• Typical Installation Completed In Approximately One Hour
• Adjustable Shackles Allow Installation To Suit Various Needs

Part Number: 136684-03079881

Notes: SuperSprings -- Rear; Self-Adjusting Suspension Stabilizing System; Provides 3000 lbs Additional Load Leveling Ability; Do Not Exceed GVWR; Incl. Poly Spring Pad; Leaf Spring Dimensions 49L x 3W x 0.946~Requires Mounting Kit PN [MXKT] ~Without Factory Top Overload Spring

Features:

• Sold as a pair left and right
• Provides 3000 Pounds Additional Load Leveling Ability
• Typical Installation Completed In Approximately One Hour
• Adjustable Shackles Allow Installation To Suit Various Needs
• Never Load Any Vehicle Beyond The Manufacturers GVWR
• Self Adjusting Suspension Stabilizing System
• Works In Conjunction w/Original Equipment Leaf Spring Assembly
• Shot Peened To Relieve Spring Stress And Extend Product Life
• Requires no maintenance; Proudly made in the U.S.A.
• Reduces Body Roll Up To 30 Pct Without Compromising Ride Quality
• SAE 5160H 51 Pct Alloy/60 Pct Carbon High Grade Steel

Part Number: 136684-03147749

Notes: SuperSprings -- Rear; Self-Adjusting Suspension Stabilizing System; Provides 4000 lbs Additional Load Leveling Ability; Do Not Exceed GVWR; Incl. Poly Spring Pad; Cab And Chassis Models Only~Leaf Spring Dimensions 51L x 3W x 1.12~Poly Spring Pad PN [PSP-19] Included~With Factory Top Overload

Features:

• SAE 5160H 51 Pct Alloy/60 Pct Carbon High Grade Steel
• Provides 4000 Pounds Additional Load Leveling Ability
• Typical Installation Completed In Approximately One Hour
• Sold as a pair left and right
• Self Adjusting Suspension Stabilizing System
• Adjustable Shackles Allow Installation To Suit Various Needs
• Requires no maintenance; Proudly made in the U.S.A.
• Never Load Any Vehicle Beyond The Manufacturers GVWR
• Works In Conjunction w/Original Equipment Leaf Spring Assembly
• Shot Peened To Relieve Spring Stress And Extend Product Life
• Reduces Body Roll Up To 30 Pct Without Compromising Ride Quality

Part Number: 136684-03536495

Notes: LP-25 Leaf Kit -- 2500 lbs. Capacity; 3 Leaf Stack; Requires Mounting Kit PN [25312]; For Air Bags On Lifted Vehicles Using Non-Tapered Lift Block~Must Remove Factory Overload Contact Springs / Removal Of Contact Overload~PN [4824] Spacer For A 4 in. Rear Lift~Use PN [4828] Spacer For A 2 in. Rear Lift And~Use PN [4830] Spacer For A 4 in. Rear Lift

Features:

• Zinc Plated Hardware/Brackets For High Quality Finish
• Required To Mount Helper Springs
• Illustrated Step By Step Instructions
• Limited Lifetime Warranty
• Long Life

Part Number: 136684-03447051

Notes: LP-35 Heavy Duty Leaf Kit -- 3500 lbs. Capacity; 4 Leaf Stack; Requires Mounting Kit PN [25312]; Big Wig Bags~For Air Bags On Lifted Vehicles Using Non-Tapered Lift Block~Must Remove Factory Overload Contact Springs / Removal Of Contact Overload~Use PN [4828] Spacer For A 2 in. Rear Lift And~Use PN [4830] Spacer For A 4 in. Rear Lift

Features:

• Mounting Kit Sold Separately
• Raised Height/Spring Rate Vary On The Adjustment Of U-Bolts
• Designed For Full Time Users
• Limited Lifetime Warranty
• High Quality Spring Steel Leaves
• Fast Easy Bolt On Installation

Part Number: 136684-03621288

Notes: Block And Add-A-Leaf Kit -- 4 in. Blocks; Incl. U-Bolts

Features:

• Block And Add-A-Leaf Kit

Position: Rear

Part Number: 136684-03621289

Notes: Block And Add-A-Leaf Kit -- 5 in. Blocks; Incl. U-Bolts

Features:

• Block And Add-A-Leaf Kit

Position: Rear