The mechanism is most likely corroded or stuck. spray it down with WD40 and move it several times from latched to unlatched by hand, do this to both sides of the mechanism and repeat if it is still difficult.
If I understand you right the door is opened and won't close because the latch is tripped. Lift up on the door handle and take your finger or a screw driver and move the latch to the open position
Try disconnecting your battery and reconnecting it this should reset the door.
Replace the door latch.
You have to take the door panel off and check the latch attachment, go to any auto parts store to show step by step instructions.
left door latch is broke
Just going by the question...I would say that the latch has gotten in "the closed door position". Be sure that the door is unlocked. With your finger lift out on the latch on the end of the door and use the door handle to "open" the door latch.
A Chevy Lumina door panel is held in by screws and push pins. After removing the screws, use a special tool to pop the pins out without damaging the panel.
nope
Remove the inside door panel of your 1994 Chevy Lumina. Remove the door handle linkage. Remove the door handle retaining bolts. Reverse the process to install the new door handle.
put a new latch in If the car has been setting for a while I would start by spraying some wd40 on the latch mechanism ,if that don't help try adjusting the striker and the door alignment Get the door open, pull the panel, adjust latch manually to diagnose or if replacement is needed
lift door handle, using screwdriver, move latch forward....will open
The sensor you are looking for is an integral part of the door latch.