o.k. let's try this!
keyless entry system (if equipped)
to lock doors/liftgate: press 7/8 and 9/0 at the same time
to unlock doors/liftgate: enter factory or personal code (see owners guide)
to open drivers door; press 3/4 with in five seconds to open other doors and lift gate.
autolock with keyless entry
system and automatic transmission (if equipped)
locks doors if doors, liftgate and liftgate window closed, ignition ON, brake pedal pressed, transmission shifted through reverse, brake pedal released; locks again if doors is opened and then all doors, liftgate and liftgate window closed, brake pedal released
to cancel or enable: enter permanent 5-digit code, within 5 seconds press and hold 7/8 within 5 more seconds press and release 3/4, release 7/8
this is right out of the book that came with my truck.
hope this might help. I'm reading through the rest of it now and will post more if it helps.