For 1990-2009 cars

Application | GM SPO Group Number
--- | ---
Cap, Reservoir | 6.635
Fitting, Pump | 6.674
Gear, Steering | 6.508
Hose, Gear Inlet | 6.670
Pipe, Oil Cooler | 6.602
Pipe, Pump Inlet | 6.671
Plate, Pressure | 6.612
Plate, Pump End | 6.609
Plate, Pump Thrust | 6.612
Pulley, Pump | 6.655
Pump, Power Steering | 6.605
Reservoir, Fluid | 6.635
Ring Kit | 6.616
Rod, Tie (Outer) | 6.233
Seal, Gear Inlet (O Ring) | 6.674
Seal, Intermediate Steering Shaft Lower | 6.519
Seal, Intermediate Steering Shaft Upper | 6.525
Seal, Pump Fitting | 6.674
Seal, Pump Shaft | 6.617
Seal, Reservoir | 6.635
Service Kits

- Pump Kit

6.605

- Ring Kit

6.610

- Seal Kit

6.609

Spring, Control Valve | 6.624
Spring, Pressure Plate | 6.612
Valve, Flow Control | 6.624