Removal Procedure

Raise and support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
Remove the tire and wheel. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
Disconnect the electronic suspension control (ESC) link rod from the sensor, if equipped. Refer to FRONT POSITION SENSOR LINK ASSEMBLY REPLACEMENT - ELECTRONIC SUSPENSION in Electronic Suspension Control under REPAIR INSTRUCTIONS .
Remove the retaining bolt for the brake hose and the wheel speed sensor brackets.

Fig 1: Removing Retaining Bolt For Brake Hose & Wheel Speed Sensor Brackets
Courtesy of GENERAL MOTORS CORP.
Remove the wheel drive shaft. Refer to AXLE SHAFT in Wheel Drive Shafts.
Remove the upper ball joint retaining nut.

Fig 2: Removing Upper Ball Joint Retaining Nut
Courtesy of GENERAL MOTORS CORP.
Disconnect the upper control arm from the steering knuckle using the J 43631 and J 45851 .

Fig 3: Disconnecting Upper Control Arm From Steering Knuckle Using J 43631 & J 45851
Courtesy of GENERAL MOTORS CORP.
Remove the upper control arm nuts and the adjustment cams (2) for the 15 Series 2WD, 4WD, and 25/35 Series 2WD.
Remove the upper control arm bolts (4) for the 15 Series 2WD, 4WD, and 25/35 Series 2WD.

Fig 4: Removing Upper Control Arm Bolts & Nuts
Courtesy of GENERAL MOTORS CORP.
Remove the upper control arm nuts and the adjustment cams (2) for the 25/35 Series 4WD.
Remove the upper control arm bolts (4) for the 25/35 Series 4WD.
Remove the upper control arm.

Fig 5: Removing Upper Control Arm & Bolts
Courtesy of GENERAL MOTORS CORP.