GM Service Manual Online
For 1990-2009 cars only

Power Steering Gear for Chevrolet Chevy P42 Commercial Chassis 1997

Both the P72 and the P92 Chassis are equipped with Saginaw 710 Series integral power steering gears. This gear has a constant 17.5 to 1 ratio and an open-center, rotary-type, four-way control valve that directs oil to either side of the rack piston. The rack converts hydraulic pressure into mechanical output.