Doors unlock after 45 mins or late at night

Question

2005 gmc sierra 1500 crew cab. Presitge APSRS3Z remote start. INT-SL+ Doors unlock on there own at strange times. After 45 mins or 4 in the morning.

Help. Tried most everything I can think of. Do I have to go into the doors to connect the lock/unlock of the remote start??

Answer 1

Just to be sure, with this setup the two units should be connected wire-to-wire and not via datalink. The blue and white wires in the datalink cable should be cut off.

If the issue is consistent, disconnect the unlock wire which is connected between the prestige and the int-sl and see if the random unlocking still happens.

-> if yes, disconnect the int-sl completely to see if issue persists.

-> if no, verify prestige wiring and settings.

Comments

This is a new install. Had the new parts for 3 years and now decided to install. The blue & white wire are cut off. Data link is not being used.

I did unplug connector 2 of the int-sl. Doors stayed locked over night.

I am now testing with lock/unlock wires between prestige and int-sl disconnected. Note. I have 2 prestige remote boxes. It does this with both. I removed the entire system last week and have had no problems back to factory original. I reinstalled everything but this time connected the parking light control to BCM instead of int-sl. Fortin help page recommended this if strange were happening. This did not help.

To me it looks like a bad int-sl. Is this possible? Guess there is no warranty after 3 years. Lol