The rear shocks in a Buick are designed to absorb rebound vibrations from the rear springs. There are two shocks, one per side. Both shocks are mounted in a vertical position in order to maximize their dampening capability. The average lifespan of rear shocks is approximately 50,000 miles and as they age their performance decreases significantly. Failing shocks cause noticeable changes in ride quality such as a rough, choppy ride and increased body roll when turning or stopping.
Place the car in park. Lift the rear of the vehicle using the jack and support it with jack stands. Chock the front wheels.
Remove the left-rear tire. Support the rear axle with the jack.
Remove the upper bolt that secures the shock to the body. Remove the lower bolt that secures the shock to the axle and lift the shock out of the wheel well.
Place the new shock in position and reinstall both of the retaining bolts. Remove the jack from underneath the axle and reinstall the tire.
Repeat steps 2 though 4 for the opposite side.
Lower the car to the ground and remove the wheel chocks. Test-drive the vehicle to ensure proper operation.
