Is there something I can do to make my doors lock automatically after I start driving (like around 15mph or something)? My 2003 did this, but my new 2009 doesn't.

 

Do u have a screen in between the gauges? If u do, use the menu and change the settings to whatever u want it to do.

 

If you have the EVIC on your gauge panel then put your truck in park go to system/setup (whatever it says) and you'll find it in there....if it still doesn't work, time for a visit to the stealership for a warranty visit...

 

before you waster your time going to the stealership, disconnect the negative cable from the battery for about 1 minute, then see if that fixes it.

 

My '01 auto locks too

 

Yes it should lock, mine does...I would do as Petro said, unhook the battery first. Make sure that when you have it unhooked to turn the key a couple times, that way it drains the memory everywhere. But yes if that doesn't fix it, and you cant change it in your evic...mmmm dealer, have fun! haha

 

Does not the owner's manual address how to set items to how you want them? I followed my owners manual the first few days I had my truck and changed settings to what I wanted.

 

No, do not disco the battery for this.

You probably bought it used. The other owner disabled it in the evic. Do as the second post days, using the steering wheel controls go into setup and navigate until you find that option.

 

Thanks, yes I bought it used and it didn't come with a manual, but I did download the manual and didn't see anything in there about it. But, based on the first and last suggestion, I found the setting in the evic. Thanks all! This is my first car with this much electronic settings.