Description

To ensure compatibility, ICON is no longer offering GM 2500HD/3500HD upper control arms as individual components. Upper control arms can only be purchased in unison with ICON shock absorbers as a complete system. The included ICON Vehicle Specific (V.S.) 2.5 Series shocks are designed and built to give your vehicle outstanding performance off-road and a smooth ride on the street. These shocks are configured specifically for each application in both length and damping tune. Like all of ICON's Shock Absorbers, the V.S. 2.5 Series shocks are 100% rebuildable and 100% revalveable. For piggyback and specific remote reservoir applications, ICON'S unique use of a 6061-billet aluminum manifold a few inches below the top cap of the shock creates an internal Bump Zone that when used creates an additional 20% of damping force. This additional force helps prevent harsh bottom outs and controls the suspension when compressing at high velocity.

Product Overview

These upper control arms feature ICON's patented Delta Joint. The Delta Joint is a heavy-duty high angle ball joint that combines the durability of a ball joint with the performance characteristics of a traditional uniball. While the industry standard uniball does a great job of allowing the control arms of a vehicle to articulate with little bind, they do have an inherent weakness that leaves more to be desired when used in a daily driven application - exposure to the elements. The Delta Joint features a zinc plated housing providing the first layer of corrosion resistance, while a tough grease seal keeps potentially harmful elements out of the inner workings of the joint. Metal on metal construction and a greaseable design increase the longevity of the Delta Joint while at the same time allowing for noise-free operation. What makes the Delta Joint unique is that it brings the best of both worlds to ICON upper control arms with features that make it more robust than a uniball, and at the same time capable of greater angularity than a typical ball joint.

Features and Benefits

• Remote reservoir design improves heat dissipation to reduce shock fade during prolonged use
• ICON Delta Joint
• 100% Rebuildable
• 100% Revalveable
• 1026 DOM Steel Construction
• CNC Bent Tubing
• Serviceable Dual Stage Bushings
• CNC Machined Bushing Housings and Sleeves
• Built-In Caster Correction
• Black Semi-Gloss Powder Coat Finish
• ICON's internal "Bump Zone" increases damping by 20% to provide more control as the shock approaches full compression
• Premium grade 5WT shock oil for consistent suspension damping along a wide temperature range
• Nitrogen charged monotube design with remote reservoir
• One-piece digressive piston design with vehicle specific valving for unsurpassed performance and ride quality on and off-road
• 7/8" diameter induction hardened, chrome plated shock shaft
• PTFE lined spherical bearings and application specific mounting hardware
• 6061 aircraft grade aluminum CNC machined components
• CAD plated, precision machined 1026 DOM steel shock body for maximum durability and corrosion resistance
• All ICON 2.5 Series Piggyback and Remote Reservoir shocks can be upgraded to ICON's Compression Damping Control Valve (CDCV)

Product Details

AAP_UDA_12:	EA
AAP_UDA_22:	1
AAP_UDA_4:	55
Add-On Part:	191011 - TUBULAR UCA BILLET CAP SET
Adjustable:	No
Ball Joint Included:	Yes
Ball Joint Mounting Type:	Press In
Ball Joint Stud Type:	Threaded
Bushing Color:	Black
Bushing Material:	Polyurethane
Bushings Included:	Yes
California Prop 65 Warning:	Yes
California Proposition 65:	WARNING: This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.
Color:	Black
Control Arm Color:	Black
Control Arm Construction:	Tubular
Control Arm Material:	Steel
Description:	11-19 GM HD 0-2" 2.5 RR SHOCK SYSTEM W/ UCA
Finish:	Powdercoated
Grade Type:	Performance
Grease Fitting Included:	yes
Mounting Hardware Included:	Yes
OEM Wheels & Tires Fitment:	Yes
Part Number:	ico78724
Pre-Greased:	No
Recommended Aftermarket Tires:	33" x 11.50" (Larger tires may fit but fender trimming and modifications will be required.)
Recommended Aftermarket Wheels:	ICON Alloys | 20x9" w/ 5.5” Backspace / 12mm Offset
Service Parts:	614519 - DELTA JOINT INSTALL PRESS ADAPTER TUBE
Suspension Grade Type:	Performance
Title:	11-19 GM HD 0-2" 2.5 PB SHOCK SYSTEM W/ UCA

Kit Options

This item is available as a full kit.
Select a kit option in the following table if you are looking for this item in a bundle form with all associated components.

Kit option/s:

Thumb	SKU	Kit Title
	icoK78102	ICON 2011+ GM 2500HD/3500 0-2in Stage 2 Suspension System (1x ico78724, 1x ico77701P)

Data: v4.2 - Upd: 2026-10-13 20:37:24

Features

Specifications

Product Attributes - Brand

ICON Vehicle Dynamics

Product Attributes - Manufacturer's Part Number

78724

Product Attributes - Part Type

Shocks and Struts

Product Attributes - Product Line

Icon Vehicle Dynamics 2.5 VS RR/UCA Shock Systems

Product Attributes - UPC

00840103408699

Product Attributes - Ride Height

Stock/Lifted

Product Attributes - Ride Height Note

Additional ride height information may be available for your vehicle, please refer to the app tab.

Product Attributes - Lifted Amount Range (in.)

0.00-2.00 in.

Product Attributes - Internal Design

Monotube

Product Attributes - Adjustable Valving

No

Product Attributes - Gas Charged

Yes

Product Attributes - Upper Mount

Stud

Product Attributes - Lower Mount

Clevis

Product Attributes - Bushing Material

Spherical bearing/PTFE

Product Attributes - Boot Included

No

Product Attributes - Body Diameter (in.)

2.500

Product Attributes - Remanufactured

No

Product Attributes - Quantity

Sold as a pair.

Product Attributes - Notes

Includes ICON Delta Joint tubular upper control arms.

Compatibility