Have a pontiac montana, but lately when I press ths remote start button, the alarm goes off. Door locks work fine.

Are you using an aftermarket key or the original? It may have a chip in it. Also if you have a spare original try it.

Sounds like the anti-theft/alarm system was triggered.
Have you tried locking and unlocking the driver door with the key to disable the alarm ?
And you need at least 12 volts to crank the engine so the battery may need to be charged up first.

hi Alan

what procedure you are doing for remote matching?
try this one and let me know.

1 Unlock the car, get in and close the door

2 Switch ignition on

3 Press the door lock button on the dash to lock the car

4 Press and hold the door lock button on the dash, the alarm will beep

5 Keep holding the door lock button on the dash, press and hold the lock on the remote,

the alarm will beep

Repeat (5) for the other remotes,

6 leave the door lock button on the dash, the alarm will beep, switch ignition off

If you can try resetting your remote, and change the batteries if you can't reset it ask a dealership how to

i hav same problem chaged battery noticed battery holder was loose so i soldered it very carefully everything works fine xcept remote start alarm just goes off like when you push the panic button not sure what happened dont think i shorted out the circuit board in the fob if engine light is on this car wont start via remote these remotes must b progamed by dealer or pro shop prob using what they call a tech II computer to remote start you hav to press lock button 1st even if car is already locked i figured this out pess and hold lock button then press start alarm dont ring and the car starts.

press the lock button on the remote then press the remote start button. if this does not work check remote start status using steering wheel buttons

My ex girlfriend had a factory installed honda remote strt on her vehicle. It was activated by hitting the lock button two times in succession. Some vehicles use a combination of the lock-unlock buttons. try using some combinations on the remote, many "oem" remote starts are installed by aftermarket installers so who knows what they did as a start function, it could also have been changed by the previous owner.

u r on ur child lock u deactivat ur child lock .

If this is a Factory installed System You will have to get it from the Dealer. If not, You need to find out Who the Manufacturer is of the System and Contact them for a Replacement.

Stand in front of the Van and press and hold both the lock and unlock buttons for 10 seconds.