GM Service Manual Online
For 1990-2009 cars only

Object Number: 424734  Size: LF
(1)Inner Tie Rod Washer
(2)Steering Linkage Inner Tie Rod End
(3)Steering Linkage Inner Tie Rod
(4)Steering Gear Boot Clamp
(5)Steering Gear Boot
(6)Steering Rack Boot Clip
(7)Steering Linkage Outer Tie Rod Nut
(8)Steering Linkage Outer Tie Rod End
(9)Steering Linkage Tie Rod Seal
(10)Steering Linkage Tie Rod Seal Retainer
(11)Hex Slotted Nut
(12)Steering Linkage Outer Tie Rod Cotter Pin
(13)Steering Gear Cylinder Inner Bulkhead Seal
(14)Power Steering Gear Inlet Pipe
(15)Power Steering Gear Outlet Pipe
(16)Steering Gear
(17)Steering Gear Pipe
(18)Steering Gear Pipe
(19)Steering Gear Insulator
(20)Steering Gear Bracket
(21)Steering Gear Bracket
(22)Steering Gear Insulator
(23)Inner Tie Rod Washer
(24)Steering Linkage Inner Tie Rod End
(25)Steering Linkage Inner Tie Rod
(26)Steering Linkage Outer Tie Rod Cotter Pin
(27)Hex Slotted Nut
(28)Steering Linkage Tie Rod Seal Retainer
(29)Steering Linkage Tie Rod Seal
(30)Steering Linkage Outer Tie Rod End
(31)Steering Linkage Outer Tie Rod Nut
(32)Steering Rack Boot Clip
(33)Steering Gear Boot
(34)Steering Gear Boot Clamp

The power rack and pinion steering system has a control valve which directs the hydraulic fluid under pressure to either side of the rack piston. The piston attaches to the rack. The rack piston uses the hydraulic pressure in order to move the steering rack to the left or to the right. The steering rack moves the tie rods. The tie rods move the steering knuckles. The steering knuckles turn the front wheels.

If the hydraulic assist fails, the vehicle maintains manual control. This condition requires more steering effort.