keyless entry and horn on 2005 Chevrolet Malibu Maxx

I change my battery and the horn will not work, nor the keyless entry. The horn was working at first with the security system, but when I changed the battery non of this work. The electronic door lock work with the key or manually using the door lock,

by in Columbus, MS on October 10, 2009
1 answer
ANSWER by , October 11, 2009
it seems when you change the battery it reset the security system you may need to get this reprogram