Disassembly Procedure

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.

Remove the front suspension strut assembly from the vehicle. Strut Assembly Removal and Installation (FE3, FE4, with F55)
Courtesy of GENERAL MOTORS COMPANY

Install the CH-45400-100 Strut Compressor Adapter (1) to the front suspension strut (2).
Courtesy of GENERAL MOTORS COMPANY

WARNING:
To prevent personal injury and/or component damage, use the proper tools to support and compress the coil spring prior to removal of the strut shaft nut when removing the coil spring. The coil spring is under extreme pressure and can become a projectile should the spring separate from the strut before all of the tension is relieved.

Place and center the front suspension strut (2) into the CH-45400-B Strut Spring Compressor (1).
1. Position the front suspension strut (2) so the CH-45400-100 Strut Compressor Adapter (3) rests on the three lower arms of the CH-45400-B Strut Spring Compressor.
2. Position the upper arms of the CH-45400-B Strut Spring Compressor (1) evenly onto the top of the front strut mount.
Using the CH-45400-B Strut Spring Compressor (1), compress the front coil spring enough to remove tension from the front strut mount.
Courtesy of GENERAL MOTORS COMPANY

Front Suspension Upper Mounting Cap (1) - Remove
Courtesy of GENERAL MOTORS COMPANY

Using the CH-50732 Strut Rod Nut Socket, 18mm (1), loosen the front strut rod mount nut.
Courtesy of GENERAL MOTORS COMPANY

Front Strut Rod Mount Nut (1) - Remove
Courtesy of GENERAL MOTORS COMPANY

Release the tension on the front suspension strut (2) and remove all the components from the CH-45400-B Strut Spring Compressor (1).
Courtesy of GENERAL MOTORS COMPANY

Remove the CH-45400-100 Strut Compressor Adapter (1) from the front suspension strut (2).
Courtesy of GENERAL MOTORS COMPANY

Front Suspension Strut (4) - Remove
Front Coil Spring Lower Insulator (3) - Remove
Front Coil Spring (2) - Remove
Front Coil Spring Insulator (1) - Remove
Courtesy of GENERAL MOTORS COMPANY

Front Strut Boot (3) - Remove
Front Suspension Strut Bumper (2) - Remove
Front Suspension Mount Lower Cup (1) - Remove
Courtesy of GENERAL MOTORS COMPANY

NOTE:
The front suspension strut mount washer (2) is oriented with the conical side up.

Separate the front strut mount (1), front suspension strut mount washer (2) and front spring upper seat (3).
Inspect the components and replace as necessary.