SKU: 45037679378

1988-2000 GM 1500/2500/3500 AlphaHD Pro S Rear Air Suspension Kit (HP10120-J-S)

Sale price$276.58 Regular price$307.31
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Ships within 48 hours · Estimated delivery Sep 29 - Oct 4

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Description

1988-2000 GM 1500/2500/3500 AlphaHD Pro S Rear Air Suspension Kit (HP10120-J-S)Description Note: For C Channel Frames Will not fit 1999 2000 Chevrolet Silverado GMC Sierra 2500 (2WD 4WD) models without Drum Brakes If the frame to axle pad distance is 7. 25'' or more: use kit HP10088 The ALPHA HD PRO S Air Suspension Kit for 1988 2000 GM Sierra Silverado tackles truck sag, sway, and bottoming out. It includes durable air helper springs with corrosion resistant end caps and 20 support wires. The built in polyurethane bumper

Description

Note: For C Channel Frames / Will not fit 1999-2000 Chevrolet Silverado / GMC Sierra 2500 (2WD/4WD) models without Drum Brakes / If the frame to axle pad distance is 7.25'' or more: use kit HP10088

The ALPHA HD PRO S Air Suspension Kit for 1988-2000 GM Sierra/Silverado tackles truck sag, sway, and bottoming out. It includes durable air helper springs with corrosion-resistant end caps and 20 support wires. The built-in polyurethane bumper protects against damage and allows driving without air when not towing. Available with or without an internal bump stop for added convenience and ride comfort.

Part Number: HP10120-J-S

Features
  • 5,000 lbs of load leveling capacity
  • 3-hour install time
  • Lifetime warranty
  • Can be run at 0 psi

Includes:

  • 6ft Braided Stainless Steel Air Lines
  • Stainless Steel Air Spring Fittings
  • Stainless Steel Air Spring Mounting Hardware
  • Stainless Steel Schrader Valves
  • Stainless Steel Roll Plates
  • Two Air Springs
  • Everything required for install
Notes
  • Never exceed manufacturer's recommended Gross Vehicle Weight Rating.
Additional Info

Why Pacbrake added a bump stop to their bags?

Peace of mind. Customers want a bump stop to prevent bottoming out from loss of air bag pressure, an extremely rare event that could damage the air bags or potentially the frame of the truck. Think of it as an "insurance policy" against bottoming out.

An additional benefit is that you can run these airbags at 0 psi when unloaded for superior ride comfort.

Are bump stops necessary?

No! For those that require max travel in their air bags, to raise and lower their rear end to pickup trailers or boats, or for those that take their trucks off roading, air bags without bump stops are recommended. Consider the HP10120 ALPHA HD air bag.

Warranty

Parts Only

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 45037679378

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TT
Lexington, US
★★★★★ 5
Best Jeans Ever!
Size: 29, Color: Soundwave
Absolutely love these jeans! I just bought two more pairs in green and rose? Had to go directly to Free People website because Amazon was sold out…I get so many compliments, and I’m 74🤣‼️😉
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Reviewed in the United States on April 30, 2026
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Jessie
Cuba, US
★★★★★ 3
Poor Quality
Size: 29, Color: Soundwave
This is my 4th pair of FP Barrels, and these felt poorly made. The holes for the button up fly were so small it was nearly impossible to button them. I’m going to see if I can stretch them out a bit. But better to buy from Free People directly!
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Reviewed in the United States on May 4, 2026
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Amazon Customer
Chelsea, US
★★★★★ 5
Best dupe!
Size: 26, Color: Soundwave
Best dupe for the pricey barrel jeans. Washes and wears very well. Denim is soft.
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Reviewed in the United States on May 1, 2026
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Mark Hok
Draper, US
★★★★★ 4
Cute
Size: 29, Color: Deep End
They were a little on the shorter side. Still cute and still will be worn.
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Reviewed in the United States on January 22, 2026
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Online Shopper
West Palm Beach, US
★★★★★ 5
Exactly as FP describes
Size: 27, Color: Deep End
Quality denim with the classic FP barrel or horseshoe leg. These are deep, dark blue rigid denim with a button fly. Hits at the ankle for me, but if you are shorter than 5'9" you may a get full length fit from these. I own these jeans in multiple colors and these are another FP win for me.
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Reviewed in the United States on January 7, 2026

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