I have a 99 chevrolet silverado and when i first got it keyless entry worked. it all of the sudden stopped working i changed battery in remotes and when i went toprogram new remote i cant get it into program mode I am doing the steps corrrectly but after ignition cycle and releease unlock button the doors dont do the lock unlock any suggestions

 

check some fuses and relays

 

What is the best way to check relay I did check fuse all are good

 

i actually dont know haha

hopefully mrdragon will make an appearance. He knows his stuff

 

For testing a relay, you should be able to use an ohm meter to get an ohm reading on two of the four/five pins. It's hard for me to describe ... The easiest way is to swap the relay with a known good one from a harmless circuit, such as the horn (only do this for testing while in your driveway/not going to drive it) and see if you can get your circuit in question to work again. I don't know anything about the circuit you're talking about, but check your labels on the fuze box cover, or in the users manual and figure out if you have a relay for the FOB/alarm.

 

I'm a bit stumped on that one too. I remember having some that would take a few tries to program though. You might even go up or down a model year on programming instructions just to see if it might work.