2008 Cadillac CTS-passenger side front door wont open from outside? Any suggestions?

SOURCE: Front passenger door won't open from inside - 2004 Dodge Intrepid

Door panel will have to come off to repair, most likely has broken door handle or cable/linkage problem.

SOURCE: Front passenger door lock wont work, seat belt light on

Sounds like the plastic clip that connects the lock has broken however regardless of fault the inner door panel has to be removed to diagnose and repair.It could also be inner door lock assembly.

SOURCE: Passenger side rear door only opens from inside.

It sounds like the linkage connecting the door handle to the latch has disengaged....you'll need to remove screws that are by the door handle, arm rest, under door and side of door and then gently pull back on the panel as there will also be retaining clips attached and you don't want to break them. You'll need to lift the door panel upwards in order to get it off the window ledge. You can then pull off the weather seal in order to see the inside of the door....

SOURCE: Passenger front door does not open from outside,

this is a common problem with VW door handles, but an easy fix!!! The door handle needs to be replaced as the fork that lifts the lock has broken off or cracked. Depending on the model it is easy to remove the door handle. spring off the Crome mld on the front and on the slam side of the door behind the rubber u will find a phillips screw. Under the crome mld is the other.
Good luck.

SOURCE: how to adjust handbrake on hyundai excel 95, fix inside front doo

Adjusting the handbrake is easy.Between the two front seats where the cup holders are behind there is a cubby hole.This has a bottom which can be easily prised out.You will see the handbrake adjusters which you just need to tighten.