GMC 15835457 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 on jackstands. Make sure to block the front wheels to prevent any rolling. Once the vehicle is securely supported, remove the wheel. Support the lower control arm with a floor jack and detach the stabilizer bar link and shock absorber from the lower control arm. 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 until the coil spring is fully extended and carefully maneuver the spring and jounce bumper out from the suspension arms. Don't forget to retrieve the spring seat. Inspect the spring seat, jounce bumper, and coil spring for any wear or damage, and replace as necessary. For installation, simply reverse the removal steps. Use the floor jack to raise the outer end of the lower control arm to simulate normal ride height and tighten all fasteners to the specified torque values.

Tighten the top nuts to the proper torque, reconnect the stabilizer bar link to the strut, and reconnect the wheel speed sensor harness.

Clean away external dirt without damaging the protective coating on the spring, and use coil spring compressor tools to compress the spring and relieve tension from the upper mount.

You can mark the position by scribing or drawing a line on the steering knuckle following the line of the strut.

Hold the strut piston rod with a wrench while unscrewing the nut, avoiding the use of an impact wrench. Then, remove the upper mount, spring, boot, bump stop, and lower spring seat in that order.

The original spring must be carefully released from the compressor. If the spring is being re-used, it can be left in compression.

Inspect the spring seat, jounce bumper, and coil spring for any wear or damage, and replace as necessary.

Lower the knuckle using the floor jack, being careful not to overextend the inner CV joint. Then remove the top nuts and pull out the strut.