99 Silverado key fob
 

changed my battery's in my key fobs and of course they don't work and I cant get my truck to start the program to reset thefobs by turning the key off and on three times also they say ground pin 4 and 8 to start programing but threes no pin in plug 8 anybody have and idea[/align]

RE: 99 Silverado key fob
 

donno what u doing and who are they that told you to do all this. you do this only if you bought a new transmitter/fob. after battery replacement, you need to re-synch the fob:

stand close to your vehicle and press and hold the lock and unlock buttons on the transmitter at the same time for 7 seconds. door locks should cycle to confirm sychronization.

'ts that simple. fob is coded into the ECM. you need to teach ECM how to recognize a fob only if you bought a new one.