GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Belt Drive


Object Number: 510271  Size: LF
(1)Reservoir Assembly Hydraulic Pump (Typical)
(2)Capstick Assembly, Reservoir
(3)Actuator, Variable Assist Steering
(4)Clip, Retaining
(5)Clip, Reservoir Retaining (LH)
(6)Clip, Reservoir Retaining (RH)
(7)Pin, Pump Ring Dowel
(7)Pin, Pump Ring Dowel
(8)Shaft, Drive
(9)Seal, O-ring
(10)Housing Assembly, Hydraulic Pump
(11)Seal, Drive Shaft
(12)Spring, Flow Control
(13)Valve Assembly, Control
(14)Seal, O-ring
(15)Fitting, O-ring Union
(16)Plate, Thrust
(17)Ring, Pump
(18)Vane
(19)Rotor, Pump
(20)Ring, Shaft Retaining
(21)Plate, Pressure
(22)Seal, O-ring
(23)Spring, Pressure Plate
(24)Seal, O-ring
(25)Cover, End
(26)Ring, Retaining
Figure 2:

Direct Drive


Object Number: 510277  Size: LF
(1)Clip, Retaining
(2)Actuator, Variable Assist Steering
(3)Fitting, O-ring Union
(4)Seal, O-ring
(5)Reservoir Assembly, Hydraulic Pump (Typical)
(6)Capstick Assembly, Reservoir
(7)Clip, Reservoir Retaining (LH)
(8)Clip, Reservoir Retaining (RH)
(9)Seal, O-ring
(10)Pin, Pump Drive Dowel
(10)Pin, Pump Drive Dowel
(11)Shaft, Drive
(12)Housing Assembly, Hydraulic Pump
(13)Seal, Face
(14)Valve Assembly, Control
(15)Spring, Flow Control
(16)Seal, O-ring
(17)Plug, Housing
(18)Plate, Thrust
(19)Ring, Pump
(20)Vane
(21)Rotor, Pump
(22)Ring, Shaft Retaining
(23)Plate, Pressure
(24)Seal, O-ring
(25)Spring, Pressure Plate
(26)Seal, O-ring
(27)Cover, End
(28)Ring, Retaining