2007 Chevrolet Tahoe Front Strut

It is going to require a special tool to compress the coil spring to release the strut from the coil spring. If you have that or access to it you'll need it. Air tools are a must to replace the struts.
Disconnect the sensor from the end of the strut shaft after removing the electrical connector.
Remove the strut from the vehicle.
Then remove the nut on strut shaft after compressing the coil spring. Then take note of the order of parts coming off of the strut. Reassemble in reverse order.