Hi there, My 95 Chev Suburban K1500 driver and passenger doors will not open from the inside when the doors are are either locked or unlocked. Obviously I am only concerned about them not opening when the doors are unlocked. When unlocked, the doors can be opened by rolling down the window and opening it from the outside using the outside door latch. I seems as if something is worn out. If wear is the issue, what parts could wear? Door diagrams and part numbers would be helpful. Thank you!

This usually works.
Take a rubber hammer,roll down the window,then manually unlock the door using the inside unlock button (not the power lock button) while you give the door a good whack about half way down where the door lock assembly holds the door closed to the car body.It may take a few whacks and a few lock/unlock cycles but this usually allows the lock to release and you can open the door.NOW.....take off the door panel and lube that lock assembly and don't close the door unless the lock can be locked and UNLOCKED.

How to fix the Chev power window door lock switch - YouTube

? 5:04
https://www.youtube.com/watch?v=XDKaDURD8Sc
Jul 13, 2013 - Uploaded by spelunkerd
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If the lock button doesnt move look like you door lock actuator jam you have to find a way to move the rear panel by the inside and unlock it manualy

Yes it is,the drive door actuator being non op

The linkage to the inside door release handle has come off most likely due to a broken clip. You will have to remove the inside door panel and see what has come apart and replace what ever is broken.

turn key twice when opening, ie turn right. once drivers door will unlock, turn twice passengers doors will unlock, and locking is turn anti clock wise once will lock all doors, turn twice will set door dead locks.dead locks will stop openand lock internal button working and handle from opening door. the same actions can be applied to the remote one press drivers door, two press passenger doors, press and hold unlock button for 5 seconds and rear window will open.

FIRST TRY TO USE LITHIUM GREASE SPRAY CAN ON ALL MOVING ITEMS INSIDE DOOR. AS YOU SPRAY EACH ITEM PUSH AND PULL ON DOOR HANDLE, DOORLOCK PLUNGER. WHILE YOUR IN THERE DO THE DOOR WINDOW GEARS AND MOVE WINDOW UP AND DOWN TOO. SPRAY ALL YOU WANT THE GREASE WONT HURT ANYTHING.
IF STILL DOES NOT WORK REPLACE DOOR LOCK ACTUATOR. USUALLY ONLY 2-3 BOLTS AND 1 CONNECTOR WITH 2 WIRES COMING OFF IT.

check the accessorie fuse first if its blown then doors will not work as they need power for cental locking

your issue involves the master control switch panel on the drivers side and or the passenger side as well some how the contact inside the switch assembly has either shorted out or no longer makes contact for the unlock side of the circuit. replace the drivers side panel switchs it's either a series of switc hs or mostimes one sigle board of switchs. you are better off going to an auto parts store rather than a GM dealership this will save you quite a bit on cash on the parts. now as to the rear tailgate. if it is electronic controled and there is an issue with the master switch you can,t manually unlock it because of a safty issue built in the system. you can manually unlock the passenger compartment doors for thew same reasons of safety but doesn't apply to the tailgate. just replace the parts and this will take care of the problem

Get in passenger side and unlock drivers side manually, this will unlock the 4 doors.