This bouncer speed sensor is better made than the original part and fits my truck exactly (perfectly). The instructions are simple. Be sure to read them carefully. **A NOTICE. When removing the old sensor, save the metal spacers/wedges as they will be needed when installing the new part. Otherwise your new sensor will be damaged. ** The porter will include a new key/seal just in case, but he will only include one. I had 3 of these, I just removed the old one and put a new one in its place. You will also need to remove the wheel, caliper and brakes, and rotor to gain access to the sensor's star screw. (Thanks GM) Otherwise it's easy and takes less than an hour if you're a beginner and about 30 minutes if you're a beginner. Over the years, the old speed sensor shrank, causing the truck's ABS system to apply the brakes while driving under normal conditions, resulting in poor fuel economy and abnormal brake pad wear.