1997 Pontiac Trans Sport Owner's Manual - Page 146

Last Door Closed Locking and Lockout Deterrent Your vehicle comes with this feature set in Mode 4. This means that: Mode 1: Both Off (Doors will always lock immediately when you press LOCK on the power door lock the switch orthe key chain transmitter,if equipped). Mode 2: Lockout Deterrent Only (If you leave your key in the ignition with driver's door open, you won't be the able to lockthe doors with the power door Iocks). Mode 3: Last Door Closed Locking Only the power (If door lock switch or keychain transmitter (if equipped) is used to lock the vehicle while any door or the liftgate is open, you will hear three chimes. The doors will not lock. Five seconds after last door is closed, alldoors the and liftgate will lock). If you leave your key in the ignition and leave the driver's door open, you won't able to lock the be doors usingthe power door lockswitch. When you press LOCK on the power locks switch or key chain transmitter (if equipped) while any door or the liftgateis open, thedoors will not lock. Instead you will hear three chimes which let you know that Last DoorClosed Locking is in operation. Five seconds after all the doors andliftgate are closed, all the doors and liftgate will lock. To change thefactory setting, while in programming mode, do the following: Mode 4: Both On (This combines modes2 and 3). 1. Press UNLOCK on the power door lock switch. 2. Count the numberof chimes you hear. The number of chimes tells you which mode your vehicle is set for. You change the mode by pressing UNLOCK again. 3. Repeat Step 2 until you hear the number chimes of that matchesthe mode you want.