This is a Factory OEM (Original Equipment Manufacturer) GMC Sierra 3 Button keyless entry remote, aka "key fob".

Factory OEM electronics in a new aftermarket case.

2001-2002 GMC Sierra

***You must have all remotes, including working ones, when performing this procedure***

1. Close all doors.
2. 
   Insert key into the ignition.
3. 
   Press and hold the power UNLOCK button on driver's side door panel. Do not release until instructed to do so in step 5.
4. 
   Quickly turn the ignition ON, OFF, ON, OFF. (ON is the position just shy of starting your vehicle, OFF is the position where you can remove your key)
5. 
   Release the power unlock button on the driver's side door panel. The vehicle should respond by locking and unlocking automatically. If locks cycle then continue to step 6.(if the door locks begin to lock and unlock BEFORE releasing the unlock button then the vehicle has not entered programming mode and you must start over. Remove key, open door and return to step 1. If the vehicle continues to lock and unlock before releasing the unlock button then there is a problem with the vehicles system and remotes must be programmed by a certified professional. If you are unable to get the door locks to cycle then you are turning the key too quick, too slow, there's a problem with the vehicles system, or the vehicle is not equipped with a factory keyless entry system.
6. Hold the LOCK and UNLOCK buttons on the remote at the same time until door locks cycle again. This could take up to 30 seconds.

7. NOW repeat step 6. for all additional remotes including working ones.

8. After step 6. has been performed for all remotes TURN ignition to ON to exit programming mode.

9. Turn ignition to OFF, remove key and test all remotes.

OEM Key Fobs:

We are proud to offer true OEM key fobs direct to you at up to 80% off dealer prices. There is a catch though, so here it goes:

You need to know the only way to get a NEW OEM key fob is to go to a dealer or authorized reseller of OEM parts, and you will pay dealer prices if you do this and spend hundreds of dollars.

The key fob you are going to purchase from us is used or as we like to say "previously loved". We recycle OEM key fobs and put them through a rigorous refurbishing process so we can guarantee our products and offer them at a reasonable price along with saving the environment. Oh, and we are not robbing you of your hard earned dollars like the stealership does. So if you are good with all of this what are you waiting for? Make your life easier, order a key fob from us and save the world!