Electronic Power Steering: Better Than Hydraulic?
Diagnosing electric power steering systems requires an understanding of voltage, current and loads. Also, a technician must understand how the modules and sensors work together to determine the level of assist.
Diagnosing Electrical Power Steering (EPS) Issues
Electric steering is a non-hydraulic system assisted by an electric motor operated by a software-driven power steering module.
GM Tech Tip: Grease Or Sealant Visible On Electronic Power Steering Gear Is Not A Leak
On GM vehicles with electric power steering starting in 2009, you may see grease or sealant on certain locations of the steering gear