03 impala hit unlock on keyless entry and sometimes the lights flash and sometimes the horn sounds any ideas?

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See FOB Light(Remote Visiual Verification) on page 2-48 and FOB Horn(Remote Audible Verification) on page 2-49 of your "Owner's Manual" for details & programming options.....
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Your keyless entry only works sometimes any help?

Answer . 1. Get remote in known working range and push both the lock & unlock bottons at the same time- this will reset the unit. 2.Replace the battery in the remote. Your

2004 Dodge dually diesel When you start the truck with the door open the lights flash and the horn honks Sometimes it starts going off when you open the door with truck running Any ideas?

Answer try reseting the computer unplug the batterys for about 30sec this should reset the computer if not then put the truck in the run posison with out starting it push the
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Why the keyless entry will not lock or unlock the doors?

One reason that your keyless entry may not work is that the batteryis dead, take it an auto parts store and have the keyless entrybattery replaced. If that does not fix it you