GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2006 🢒 GMC Sierra Denali 🢒 Body 🢒 Wiring Systems 🢒 Power Steering Schematics
Figure 1:

Power, Ground, Serial Data, Steering Wheel/Speed and Brake Pedal Position Sensor
Object Number: 1570418 Size: FS
Master Electrical Component List
Power Steering System Description and Operation (w/ Electro-Hydraulic Steering)
Control Module References
Hydraulic Motor Power and Ground
Ignition Switch - ACC/RUN and RUN/START BUS BARS and IGN B Fuse
Ignition Switch - START, RUN, and ACC/RUN/START BUS BARS, IGN A and CRNK Fuses
IGN 0, RR WPR, SEO ACCY, TBC ACCY, TBC IGN 0, and WS WPR Fuses
IGN 0, RR WPR, SEO ACCY, TBC ACCY, TBC IGN 0, and WS WPR Fuses
IGN 0, RR WPR, SEO ACCY, TBC ACCY, TBC IGN 0, and WS WPR Fuses
High Speed GMLAN (HP2)
G203 - 1 of 2
G103 and G106 - Gas
Figure 2:

Hydraulic Motor Power and Ground
Object Number: 1570419 Size: FS
Master Electrical Component List
Power Steering System Description and Operation (w/ Electro-Hydraulic Steering)
Control Module References
Power, Ground, Serial Data, Steering Wheel/Speed and Brake Pedal Position Sensor
G120, G121, G122, G310, G311, and G405 (HP2)
G120, G121, G122, G310, G311, and G405 (HP2)
G120, G121, G122, G310, G311, and G405 (HP2)