This prevented the ABS from inadvertently engaging at low speeds on my 2004 Express van, so I'm very happy with that as the dealer was charging about a thousand dollars a side to get the job done . The sensor wiring, including terminals, matched my factory wiring exactly. They were made in Mexico and not packaged well in factory packaging for such an expensive item. If you plan to do this buy new GM bolts to hold them in place as you will most likely blow off one or two of the 15mm bushings on the old ones when tightened to 133 ft lbs. If you live in a rust belt you should buy new dust shields as the old ones are probably junk. You will also need to buy or make some sort of puller to pull out the old hubs as they will likely rust in place. In the rust belt, expect at least 4-5 hours on each side unless you are a professional mechanic and have never done this before.