Sierra 2500HD/3500HD 2011-2026 GMC - Idler Arm Support Frame Gusset Kit by Cognito

The Cognito Idler Arm Support Frame Gusset Kit (110-91329) is designed to reinforce a critical area of the frame on 2011–up GMC Sierra 2500HD/3500HD trucks. Hard use, oversized tires, and lifted suspension systems can place significant stress on the idler arm support area, leading to frame flex and accelerated steering component wear.

This kit strengthens the idler support section of the frame using 1/4-inch high-strength plate steel gussets, significantly improving rigidity and reducing unwanted flex under load. By reinforcing this area, the kit helps maintain steering alignment and durability in demanding conditions.

Engineered for precise fitment on GM HD trucks, the gusset kit is compatible with both factory and aftermarket idler arm supports. Once installed, it provides additional structural support that helps extend steering component life and improve overall steering stability.

Features & Benefits

• Reinforces the idler arm support area of the frame
• Reduces frame flex under steering load
• Improves steering durability and stability
• Compatible with factory and aftermarket idler arm supports
• Constructed from 1/4" high-strength plate steel
• Precision fitment for GM HD trucks