These shocks were purchased to replace the original shocks on my 2013 Silverado. It was very easy to remove the old shock absorbers and install the new ones. 2 bolts for shock absorbers. It is recommended to spray the bolts with WD40 or similar a few days before removing the bolts. This makes it easier to remove the screws. Good videos on You Tube for anyone having installation questions. Drive like new. Nice DIY project. Highly recommended.