George B
¯\_(ツ)_/¯
It’s called the RKE module but I think in 01 it was located somewhere else and the receiver is in the A-pillar. If you replace it go with a GM one and have it programmed at the dealer or with a Tech2. Don’t bother with the Dorman modules.The module on the driver's door which contains all the switches for power windows, door locks and mirror adjustment. Not sure what it is called.