GM 13312084 Rear Spring

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To remove the coil spring and jounce bumper, start by loosening the wheel lug nuts and raising the vehicle with jackstands. Support the lower control arm with a floor jack and detach the stabilizer bar link if necessary. Remove the lower control arm-to-knuckle nut and bolt, as well as the upper control arm-to-lower control arm link bolt. Slowly lower the floor jack to fully extend the coil spring, then remove it along with the jounce bumper from the suspension arms. Inspect the spring seat, jounce bumper, and coil spring for wear and damage, replacing any necessary parts. To install, reverse the removal steps and use new fasteners. Raise the lower control arm with the floor jack to simulate normal ride height, then tighten all fasteners to the specified torque. Finally, install the wheel and lug nuts, lower the vehicle, and tighten the lug nuts to the specified torque.

The strut and spring assembly should be removed and mounted in a vise. A spring compressor should be used to relieve pressure from the upper spring seat, and the damper shaft nut should be unscrewed while holding the shaft in place.