Power Steering System Description and Operation

1999 GMC Forward Control 5.7 R, AutomaticSECTION Power Steering System Description and Operation
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

The Magnasteer® system is a speed-dependent power steering system. The Magnasteer® system provides power assist at varying levels depending on need.

A bi-directional magnetic rotary actuator in the steering gear adjusts the amount of torque (driver effort) necessary to turn the steering wheel.

The Magnasteer® is controlled through the ABS module and varies the torque by adjusting the current flow through the actuator.

The amount of adjustment will be directly related to the vehicle speed. The controller receives speed-related input signals from the vehicle speed sensor.

Refer to Variable Effort Steering (Magnasteer®) for more information on Magnasteer®.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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