Replaced some cheap shock absorbers I bought about a year ago to save money. Do not do that. Buy it. Not much more, but much better. My 2005 Trailblazer runs like new and I was able to replace both in about half an hour. Installation Tip: Use a scissor jack under the damper when removing/installing. The shock expands after it is unbolted/loosened and you will need a jack to compress it enough for the bolt to go through the mounting hole.