GMC 20909156 Front Suspension Strut Assembly

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Grasp each front tire at the front and rear edges, push in at the front, pull out at the rear and feel for play in the steering system components. If any freeplay is noted, check the tie-rod ends for looseness or wear.

Install the wheel and lug nuts, then 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, taking care to protect the unit.

Slightly raise the outer end of the lower control arm with a floor jack.

Start by loosening the wheel lug nuts and raising the vehicle securely on jackstands. Remove the wheel and support the control arm with a floor jack.

Visually inspect the steering and suspension components for damage and distortion. Look for damaged seals, boots and bushings and leaks of any kind. Examine the bushings where the control arms meet the chassis.

The strut and spring assembly should be removed and mounted in a vise, taking care to protect the unit. A spring compressor should be installed following the manufacturer's instructions to relieve force from the upper spring seat. The damper shaft nut should be loosened and removed, along with the suspension support. The bearing and rubber portion of the suspension support should be inspected and replaced if necessary. The top mount assembly and upper spring seat should be removed, checking for cracking and replacing if needed.

Finally, remove the shock absorber.