Picked up an 03 2 door Blazer tonite. Remote was locking and unlocking correctly. My son was sitting in the car playing around with whatever he could get his hands on and now the remote only activates the alarm when lock is pressed but it will not lock the doors. Unlock works correctly. What do I have to reset or reprogram? Door locks inside the car work properly. The other thing I now noticed is that the horn always blows once when locking and twice when unlocking. Before you had to hold the button down for 3 seconds to hear the horn. Thanks

 

Have a look in your owners manual. If that does not get you what you want, search for "remote reprogram" and you should get the procedure.

 

Somehow I got it to lock the doors again. Only issue now is the horn blows once on lock, twice on onlock. It is supposed to be silent unless you hold the button for 3 seconds, then the horn should blow. Dont see anything in manual concerning this issue. Thanks

 

The audible warning is a programmable feature. I do not have access to the procedure for programming this to either be on or off at the moment.

 

Thanks for the response. Is this something that is in the owners manual or some supplemental documentation?