I have also posted this thread on the "No Drivetrain" section.
Several days after installing the XZT+ I started to have power lock issues. At first the truck would lock itself with the engine off, then when I raised the electric windows the doors would lock. Finally the locks would continually cycle as if the locking switch was stuck in the locking position. This occurred even with the engine off!
I checked all the switches and wiring and could find nothing wrong. Finally, I unplugged the Quad and the problem stopped.
I've been running the more aggressive tune (XZT+ 2000) Anyone else have similar issues? If so, how did you solve this problem?

 

weird stuff.

 

yeah, very strange, I didn't think there would be for the xzt to affect power locks, considering what it hooks up to.

 

It's funny that you mention this. I want to clearly say that I have NO idea if this could be my XZT+ box but, recently my locks have been unlocking themselves as I drive. I always have them unlocked when I'm in my truck but sometimes they are just clicking away continuously trying to unlock.

I also have an 2001.5, I don't know if there is any connection but just felt I would mention it...
I am using the XZT+2004 tune currently.

 

My locks were cycling even with the engine off and the vehicle parked in my driveway!

 

Have you called Quadzilla??

 

I've PM'd Quad on this site and sent the company an email. May have time to call tomorrow. Yesterday I disconnected and then reconnected the unit a few hours later. Since then, the symptons have not re-occurred. Go figure!