They fit my 2007 GMC Yukon XL perfectly. They are easy to mount when changing tires. They can be easily mounted on tires that have already been mounted. All you have to do is break the front bead and push down on the tire to access the TPMS sensor to replace it. They quickly trained using the truck's computer. I used an Autel MaxiTPMS TS501 as I'm a mechanic and already had one.