reprograming a keyless remote

[alcorh]

i was wondering if anyone knew how to reprogram a keyless remote for a 2000 chevy silverado. i bought a knew one and want the old one to continue to work. if anyone can help i would appreciate it. thanks

[Levi(WA)]

There are 2 different ways to do it, I can't remember the year breakdown, If you do a search you can find them both, one will work the other won't
BTW, you will have to program them both at the same time.

[mjgjr72]

you have to do all receivers at once. once reprogram mode is entered it erases all stored remotes
1 start with ingnition off, hold down the power unlock button on door panel. turn ignition key on,off,on,off, release power unlock button on the door panel. the locks will cycle once.

2 hold down the keyless entry transmitter lock and unlock buttons for 15 seconds. the locks will again cycle once.

3 repeat step 2 for each additional keyless entry transmitter.

4 turn ingnition on to exit the keyless entry transmitter proggramming mode.

check funtion of remotes

the second method requires scan tool