Pitman Arm

This procedure covers the removal and replacement of the pitman arm on a 2014-2018 Chevrolet Silverado 1500 with 5.3L V8, which connects the steering gearbox to the center link of the steering linkage.

Warnings

Tools required

Parts

• Pitman arm × 1 — Use OEM specification
• Pitman arm castellated nut × 1 — Use OEM specification

Preparation

1. Park vehicle on level, solid surface and apply parking brake
2. Place wheel chocks behind rear wheels
3. Turn steering wheel to center position and lock ignition (remove key)
4. Raise front of vehicle with floor jack and support securely on jack stands under frame rails
5. Remove driver side front wheel
6. Spray pitman arm taper and nut with penetrating oil and allow to soak for 10-15 minutes

Procedure

1. 1

   Mark pitman arm position
   Before removal, use a paint marker or center punch to mark the relationship between the pitman arm and the steering gearbox sector shaft. This ensures proper alignment during reinstallation and maintains steering wheel center position. Mark both the arm and the shaft in at least two locations.
2. 2

   Access pitman arm
   From underneath the vehicle, locate the pitman arm connected to the steering gearbox sector shaft. The arm extends downward from the gearbox on the driver side of the frame. Verify clear access to the pitman arm nut and the connection point to the center link.
3. 3

   Remove pitman arm castellated nut
   Using a deep socket and breaker bar, remove the castellated nut securing the pitman arm to the center link. The nut may have a cotter pin that must be removed first by straightening the legs and pulling it out with pliers. Discard the old nut as a new one should be installed.
4. 4

   Separate pitman arm from center link
   Install a pitman arm puller or ball joint separator onto the pitman arm taper where it connects to the center link. Tighten the puller according to manufacturer instructions until the taper releases from the center link. Do not strike the puller or arm with a hammer. Once separated, remove the puller and move the center link aside.
   ⚠Never use a pickle fork or hammer to separate the taper joint as this will damage the center link ball socket and pitman arm.
5. 5

   Remove pitman arm shaft nut
   Locate the large nut securing the pitman arm to the steering gearbox sector shaft. Using a deep socket and breaker bar, loosen and remove this nut. The sector shaft has splines and the arm may resist turning during removal. If necessary, have an assistant hold the steering wheel to prevent rotation.
6. 6

   Remove pitman arm from sector shaft
   Install the pitman arm puller onto the pitman arm where it mounts to the sector shaft. Position the puller to press against the sector shaft while pulling the pitman arm. Tighten the puller slowly and evenly until the arm releases from the splined shaft. Remove the puller and pitman arm from the vehicle.
   ⚠The pitman arm may release suddenly from the shaft. Ensure the puller is properly seated and tightened gradually to maintain control.
7. 7

   Inspect and clean mounting surfaces
   Inspect the sector shaft splines for damage, wear, or corrosion. Use a wire brush to clean the sector shaft splines and threads. Inspect the center link ball socket for excessive play, tears in the boot, or damage. Replace the center link if any damage is found. Clean the mating surface on the new pitman arm.
8. 8

   Install new pitman arm onto sector shaft
   Align the new pitman arm with the alignment marks made during disassembly. The arm has a master spline that only allows installation in one position. Slide the pitman arm onto the sector shaft, ensuring proper engagement with the splines. Install the sector shaft nut hand-tight.
   ⚠Ensure alignment marks match exactly to maintain proper steering wheel position and prevent off-center steering.
9. 9

   Torque pitman arm shaft nut
   Using a torque wrench and deep socket, tighten the pitman arm nut to the specified torque. This is a critical high-torque connection. Have an assistant hold the steering wheel if the shaft rotates during tightening.
   Torque spec

   Pitman Arm Nut185 Nm (136 lb-ft)
10. 10

    Connect pitman arm to center link
    Position the pitman arm ball stud into the center link socket. Ensure the taper is clean and properly seated. Install the new castellated nut and tighten by hand until snug.
11. 11

    Torque center link connection
    Using a torque wrench, tighten the castellated nut connecting the pitman arm to the center link to specification. The nut should be tightened to the specified torque and then additional rotation may be needed to align the cotter pin hole. Never back off the nut to align the hole; only tighten further up to 1/6 turn (60 degrees) if needed.
    Torque spec

    Tie Rod Nut68 Nm (50 lb-ft)
12. 12

    Reinstall wheel and lower vehicle
    Install the driver side front wheel and thread lug nuts by hand. Lower the vehicle until the tire just contacts the ground to prevent wheel rotation. Torque the lug nuts in a star pattern to specification. Fully lower the vehicle and remove jack stands.
    Torque spec

    Wheel Lug Nuts169 Nm (125 lb-ft)

Reassembly

1. Double-check that the pitman arm shaft nut is torqued to 185 Nm (136 lb-ft)
2. Verify steering wheel is still centered with wheels pointing straight ahead
3. Ensure all alignment marks match original positions
4. Confirm all fasteners are properly tightened

Verification

• Start the engine and turn the steering wheel lock-to-lock while stationary, listening for unusual noises or binding
• Check that the steering wheel returns to center position smoothly
• Verify no play or looseness exists in the pitman arm connections by having an assistant turn the steering wheel slightly while you observe the pitman arm movement
• Perform a low-speed test drive in a safe area to verify proper steering operation and response
• Schedule a professional wheel alignment to ensure proper toe and steering angle settings

More procedures for this vehicle