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Tools Required J1859-A Steering Wheel Puller Removal Procedure Caution: Refer to SIR Caution in Service Precautions. 1. Remove the inflatable restraint steering wheel module. 2. Mark the relationship of the steering wheel (1) to the column. 3. Remove the steering wheel and the nut (2). 4. Use the J1859-A in order to remove the steering wheel from the column. Installation Procedure 1. With the marked relationship references in line, install the steering wheel (1) onto the column. Notice: Refer to Fastener Notice in Service Precautions. 2. Install the steering wheel nut (2). Tighten the steering wheel nut to 41 Nm (30 ft. lbs.). 3. Install the inflatable restraint steering wheel module.

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revise the Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement procedure in the Variable Effort Steering (1998-2001 model years) or Steering Wheel and Column (2002-2003 model years) and add the Steering Wheel Position Sensor Centering procedure in the Steering Wheel and Column sub-sections of the Service Manual. Please replace the current information in the Service Manual with the following information. The following information has been updated within SI. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page. Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement Removal Procedure Caution: Refer to SIR Caution in Cautions and Notices. 1. Disable the SIR system. Refer to SIR Disabling and Enabling Zone 3 in SIR. 2. Remove the steering column from the vehicle. Refer to Steering Column Replacement. 3. Remove the following from the steering shaft: 3.1. steering shaft seal (7) 3.2. sensor retainer (6) 3.3. steering wheel position sensor (5), refer to Steering Wheel Position Sensor Centering. 3.4. 2 lower spring retainers (4) 3.5. lower bearing spring (3) 3.6. lower bearing seat (2) 3.7. adapter and bearing assembly (1) Installation Procedure

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Subject: Clunking Noise Under Hood and Can Be Felt in Steering Wheel and/or Steering Column(Replace Upper Intermediate Steering Shan [I-Shaft] Assembly) Models: 2002-2006 Cadillac Escalade Models 1999-2007 Chevrolet Silverado Models (Classic) 2000-2006 Chevrolet Suburban, Tahoe Models 2002-2006 Chevrolet Avalanche 1999-2007 GMC Sierra Models (Classic) 2000-2006 GMC Yukon, Yukon XL Models 2003-2006 HUMMER H2 A The lower steering column bearingmay create the same noise as the intermediate shaft. Before replacing the I-shaft, verify the noise isn’t being caused by movement from the lower steering column bearing. Check the bearing for movement by pushing up and down on the I-shaf where it attaches to the steering column A Frame Snap and/or Popping Type Noise – A frame snap or popping type noise can be duplicated on rough or smooth road surfaces with steering wheel input to the left or the right. This type of noise can be HEARD and is typically louder with the windows rolled down. For additional information refer to Corporate Bulletin Number 03-08-61-002F or newer – Snap/Popping Type Noise Coming from Front of Vehicle (Remove Front Crossmember Change Fastener Orientation

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1. Open hood. 2. Disconnect battery ground cable (14301). Refer to Section 14-01. 3. From inside vehicle, remove nuts retaining steering column tube boot (3C611) to cowl panel. 4. Remove bolt retaining steering column intermediate shaft coupling (3A525) to steering column lower yoke (3N725) . 5. Position steering column tube boot out of the way. Remove pinch bolt retaining steering column intermediate shaft coupling to power rack and pinion steering gear and remove steering column intermediate shaft coupling . 6. Raise vehicle on a twin post hoist and remove front wheel and tire assemblies. 7. Remove exhaust system flex tube-to-dual converter Y-pipe attachment. Disconnect heated oxygen sensor wiring harness. Remove dual converter Y pipe (5F250) from vehicle. Dual Converter Y Pipe Removal 8. Support vehicle with jack stands under rear edge of front sub-frame (5C145). 9. Remove tie rod cotter pins and nuts, and remove tie rod end (3A130) from RH front wheel knuckle (3K185) and LH front wheel knuckle (3K186). 10. Remove tie rod end from front wheel spindle tie rod (3280) . Mark position of jam nut to maintain alignment. 11. Remove nuts from steering gear-to-front sub-frame retaining bolts. 12. Remove rear sub-frame-to-body retaining bolts. 13. Raise twin post hoist carefully until rear sub-frame (5R003) separates from body approximately 102 mm (4 inches). 14. Remove heat shield push-pin retainers from power steering hose bracket (3C510). Remove steering shaft U-joint shield (3F540). 15. Remove screw and power steering left turn pressure hose (3A714) from power steering hose bracket . Remove two screws and power steering hose bracket. 16. Remove LH stabilizer bar link (5K484). 17. Disconnect power steering pressure switch electrical connector. 18. Rotate power rack and pinion steering gear to clear bolts from front sub-frame and pull left to ease line fitting removal. 19. Place a drain pan under vehicle and remove hydraulic power steering pressure hose and power steering return hose from fittings on power rack and pinion steering gear. 20. Remove power rack and pinion steering gear assembly through LH wheel well. Installation 1. Install new Teflon® O-rings on both line connector assemblies as described under Quick Connect Power Steering Fitting—Seal Replacement. 2. Place steering gear retaining bolts in steering gear housing (3548). 3. Install power rack and pinion steering gear through LH wheel well. 4. Install power steering hose bracket and two screws. Tighten to 9-12 Nm (80-106 lb-in). 5. Install hydraulic power steering pressure hose and power steering return hose to fittings on power rack and pinion steering gear. Tighten hoses to 33-41 Nm (25-30 lb-ft). 6. Install power steering pressure hose and and screw. Tighten to 9-12 Nm (80-106 lb-in). 7. Connect power steering pressure switch electrical connector. 8. Position power rack and pinion steering gear into front sub-frame. 9. Install tie rod ends onto front wheel spindle tie rods . 10. Install push-pin retainers at top of heat shield. 11. Install tie rod end to RHfront wheel knuckle and LH front wheel knuckle. Install nuts and tighten to 47-63 Nm (35-46 lb-ft). Install new cotter pins. 12. Install LH stabilizer bar link. Tighten to 76.5-103.5 Nm (57-76 lb-ft).

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Power Steering System Squeaking Noise Repair Procedure AFFECTED VEHICLE RANGE CONDITION SUMMARY: POWER STEERING SYSTEM SQUEAKING NOISE Situation: On some S-Type, X-Type and XJ Range vehicles within the VIN ranges above, a squeaking noise may be apparent from the power assisted steering system when the steering wheel is rotated in either direction. The noise is caused by a seal inside the steering rack. The noise can be transmitted through the steering column and steering wheel, making it difficult to diagnose. This bulletin does not address any other PAS noises, such as pump or drive belt related noises. Action: In the case of a verified customer complaint matching the description above, refer to the Repair Procedure detailed in this bulletin and complete the service fix.REPAIR PROCEDURE PAS SQUEAK/FLUID ADDITIVE Open driver’s door. Ensure the gear lever is in either neutral or park, the parking brake is ‘ON’, and the ignition is ‘OFF’. Open hood and install fender protectors. 4. Remove the power steering fluid reservoir cap (and filter mesh on XJ and S-Type vehicles) and ensure the fluid level is correct. (Figure 1) 5. Using a suitable clean syringe, remove 50 ml of steering fluid. NOTE: The fluid additive must only be added once and the supplied label must then be affixed to the power steering fluid reservoir. 6. Replenish the power steering fluid reservoir with 50 ml of the specified fluid additive (C2S 48887). 7. Affix the supplied label to the power steering fluid reservoir NOTE: Suitable temperature reading equipment must be positioned into the power steering fluid reservoir, (filter mesh must be removed on XJ and S-Type vehicles) and that the temperature can be read while carrying out the heating process. 8. Insert the temperature reading equipment probe into the power steering fluid reservoir (about halfway into the depth of the fluid). HEATING THE STEERING FLUID TO 100°C +/- 5°C (212°F +/- 10°F) 1. Turn ignition ‘ON’ and start the engine. With the engine idling, turn the steering wheel from lock to lock four times to cycle the fluid additive into the system. (Figure 2) CAUTION: Under no circumstances hold the steering wheel on full lock while heating the steering fluid (to avoid damage to the steering system). CAUTION: While carrying out the following procedure, ensure that 105°C (221°F) is not exceeded. 3. While stationary and with the steering wheel in the center position (road wheels in the straight ahead position), turn the steering wheel 90° (quarter turn) right and hold firmly with both hands. (Figure 3) ^ Increase the engine speed to 3000 rpm. ^ Monitor the power steering fluid temperature until 100 +/- 5°C (212°F +/- 10°F) is reached. PERFORMING THE STEERING MANEUVER NOTE: The steering maneuver should be carried out on a hard flat surface outside of the workshop. CAUTION: Do not hold the steering wheel on full lock for more than two seconds as this may cause damage to the steering system. 1. Verify the power steering fluid temperature is at 100 +/- 5°C (212°F +/- 10°F), engine idle speed set between minimum 900 rpm and maximum 1000 rpm. 2. Turn the steering wheel to full lock and hold for two seconds.