Installation Procedure

Prior to removing or installing the bushing, place a wedge or spacer between the control arm bushing housing. This keeps the control arm bushing housing from bending while removing or installing the bushing.
Install the front bushing into the lower control arm.
Install the J 21474-4 , the J 21474-5 , and the J 21474-13 .
The lip is on the outside of the control arm.
Tighten until the front bushing seats fully into the lower control arm. Remove the tools.

Fig 1: Installing J 21474-4, J 21474-5 And J 21474-13 (4WD)
Courtesy of GENERAL MOTORS CORP.
Install the rear bushing into the lower control arm.
1. 5.1. Install the J 22269-1 , the J 21474-2 , and the J 21474- 13 .
  The lip is on the outside of the control arm.
2. 5.2. Tighten until the rear bushing seats fully into the lower control arm. Remove the tools.
Fig 2: Installing J 22269-1, J 21474-2 And J 21474- 13 (4WD)
Courtesy of GENERAL MOTORS CORP.
Remove the lower control arm from the vise.
Install the lower control arm to the vehicle. Refer to Lower Control Arm Replacement (RWD) or Lower Control Arm Replacement (4WD) .