Sorry to tell you but the G.M. units at least don't work that way.
It's all within a rack asm. with electric moror, torque sensor & control module.
This is part of the description for that '04 Malibu:
Power Steering Motor
The power steering motor is a 12 volt brushless DC reversible motor with a 65 amp rating. The motor assists steering through a worm gear and reduction gear located in the steering column housing.
BC
