COG Idler Arm Support

For model years 2011–2014 and most of 2015, GM included OEM provisions for a steering stabilizer, requiring two mounting points: one on the right side of the steering center link and one on the left side of the frame. All 2011+ models retain the center link mounting provision—a tapered hole near the idler arm. However, only 2011–2014 and select 2015 trucks came with the frame-side mounting clevis (two welded tabs on the crossmember). This OEM clevis interferes with the Cognito bracket and must be removed if present, as the included FOX stabilizer is not compatible with the factory mounting location.

In 2011, GM introduced a redesigned HD platform with numerous improvements, including updates to the steering system and frame-mounted components. However, the pitman and idler arms remained mounted in single shear to the center link—a known weak point. Most steering performance issues are addressed with the Cognito Pitman and Idler Arm Support Kit (SKU 110-90772), which reinforces the system by converting to a double shear mount. Still, some truck owners choose to further enhance control with the addition of a steering stabilizer.

For 2016+ models, GM eliminated the factory clevis, making this kit a truly bolt-on solution—no cutting, drilling, or welding required.

This Cognito FOX Steering Stabilizer Kit is fully compatible with the Cognito Pitman and Idler Arm Support Kit.

Cognito 11-25 Chevrolet Silverado 2500/3500HD / 11-25 GMC Sierra 2500/3500HD Steering Idler Arm

2011-2015 model years require cutting off of the OEM frame clevis with tabs

Compatible with lift kits that have the center link in the factory location

Cognito Fox Steering Stabilizer Kit for 2011-2025 GM 2500HD/3500HD

Simple and completely bolt on installation for 2016+ model years

Compatible with the Cognito Pitman and Idler Arm Support Kit

Includes Fox Performance Series 2.0 IFP Steering Stabilizer

Reduce feedback from the road through the steering wheel

DIY Install Time: 20 min

Cognito Stabilizer