How to Replace GM Struts

The struts on GM cars are one big assembly containing the front-end shock absorbers, coil springs, spring seats and bearings connected to the steering knuckle. Although the shock absorbers generally need the most service on the assembly, there can be times when the whole strut needs replacing. Removing and replacing a strut might not be a complex procedure, but it often requires the help of another person due to the strut's excessive weight.

Instructions

1

Make sure the parking brake is on, and block the rear wheels. Lift the front end of the car on jack stands, and remove the wheel for the strut that needs replacing. Remove both wheels now if you are changing both struts.

2

Detach the brake line bracket if there is one. It will be above the place where the strut connects with the steering knuckle. Mark the current strut's position as it relates to the steering knuckle, using chalk or washable paint. Use the marks as a guide to determine the new strut's position.

3

Disconnect the tie-end rod from the steering arm, if there is one, by removing its cotter pin and castellated nut. Disconnect the brackets connecting the brake hose and ABS wiring harness to the strut using the proper size of wrench, then remove the bolts mounting the strut to the steering knuckle.

4

Separate the strut from the knuckle by pushing in on the strut and pulling out on the brake disc. Unplug the electrical connector, if there is one. Remove the three upper mounting bolts for the strut while an assistant holds onto it, then remove the strut assembly through the fender well.

5

Compare the markings you made on the old strut with the new one. Mark the new strut in the same location.

6

Install the new strut and coil spring assembly within the strut tower, and connect the upper mounting bolts while your assistant balances the strut. Reconnect any electrical connectors, then slide and mount the steering knuckle into the strut flange, installing the bolts with their heads facing the front of the vehicle.

7

Connect the brake hose and ABS harness brackets to the new strut, tightening their bolts. Reconnect the tie-end rod and brake line bracket if needed. Use a new cotter pin with the tie-end rod.

8

Replace the wheel and lower the vehicle, then tighten the upper mounting bolts for the strut assembly to their required torque. This normally ranges from 30 to 35 foot pounds, depending on the exact model.