Chevrolet Silverado / GMC Sierra. Service manual — part 2737

The flat on the steering gear stub shaft is parallel with the steering gear side cover.

The master spline (3) on the steering gear pitman shaft is in line with the steering gear
pitman shaft lash adjuster screw (1).

Fig. 98: Rotating Stub Shaft 45 Degrees From Each Side Of Center Of Stub Shaft
Courtesy of GENERAL MOTORS CORP.

8. Place a torque wrench on the stub shaft with the handle in the vertical position.

9. Rotate the steering gear stub shaft 45 degrees from each side of the center of the steering

gear stub shaft. The steering gear stub shaft must rotate smoothly and must not stick or bind.

10. Record the steering gear worm bearing preload measured on or near the center.

IMPORTANT: Prevent the steering gear pitman shaft lash adjuster screw

from turning while tightening the steering gear pitman shaft
lash adjuster nut.

2008 Chevrolet Silverado 1500

2008 STEERING Power Steering - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

11. Recorded steering gear worm bearing preload must be 0.8-1.7 N.m (7.1-15.1 lb in), with the

steering gear pitman shaft lash adjuster nut installed. If the torque is outside this range,
readjust or repair the steering gear assembly as required.

12. To obtain the correct reload torque, adjust the over center preload by turning the steering

gear pitman shaft lash adjuster screw clockwise.

13. Add increments of 0.7-1.1 N.m (6-10 lb in) torque to the previously measured steering gear

worm bearing preload torque.

Tighten: Tighten the nut to 49 N.m (36 lb ft).

14. Install the steering gear. Refer to Steering Gear Replacement (Rack and Pinion) or

Steering Gear Replacement (Non-Rack and Pinion).

STEERING GEAR PITMAN SHAFT AND HOUSING COVER REPLACEMENT - OFF VEHIC
VEHICLE

Disassembly Procedure

1. Remove the steering gear. Refer to Steering Gear Replacement (Rack and Pinion) or

Steering Gear Replacement (Non-Rack and Pinion).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 STEERING Power Steering - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 99: Cleaning Exposed End Of Pitman Shaft (670 Gear)
Courtesy of GENERAL MOTORS CORP.

2. Remove the pitman arm nut (3).

3. Remove the pitman arm washer (2).

4. Clean the exposed end of the pitman shaft.

5. Clean off the steering gear housing (1).

6. Use a wire brush to clean the steering gear pitman shaft splines.

2008 Chevrolet Silverado 1500

2008 STEERING Power Steering - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 100: Centering Stub Shaft (670 Gear)
Courtesy of GENERAL MOTORS CORP.

7. To center the steering gear stub shaft:

1. Rotate the steering gear stub shaft (1) with a wrench from stop to stop.

IMPORTANT: The steering gear pitman shaft will not clear the housing if it

is not centered.

2008 Chevrolet Silverado 1500

2008 STEERING Power Steering - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado