Yes it s going to be your solenoid in your rear door.
2003 yukon denali rear power door locks not locking.
Does not work with the master lock from driver location either.
2002 yukon rear hatch lock not locking.
Buy rear liftgate door lock actuator replaces 15250765 15808595 746015 25001736 compatible with chevy gmc cadillac vehicles tahoe suburban yukon denali escalade esv ext tailgate hatch.
Swap them around and see if the problem swaps with them.
The rear is supplied power by the locks fuse.
I sent you information to your rear cargo doors which is the most common issues your your yukon.
We manually lock the door when we get out but is easy to forget to do this.
Passenger rear door lock will not lock or unlock when switches pressed.
I ve 2 similar door lock issues.
Now the left rear door lock solenoid has failed.
There is an unlock relay and a lock relay.
Buy rear liftgate door lock actuator replaces 15250765 15808595 746015 25001736 fits chevy tahoe chevy suburban gmc yukon yukon xl denali cadillac escalade esv ext tailgate hatch actuator.
The fuse supplies power to the lock and unlock relays.
It could be as simple as that.
The door handle just flops around and hangs partially open but is not actuating the locking mechanism.
In a possibly related event she also started having a problem where sometimes when you put the key in the ignition the key wont rotate the cylinder.
Also is a safety issue she grand children ride in the car.
They lock but not unlock.
2003 chevy tahoe rear doors and liftgate fix.
Oh ok got you now.
Rear door on left side will not lock with key fob or when all other doors lock when you start to drive.
2007 gmc yukon 146 000 mi.
1 my wife s 2003 yukon will not unlock the back doors or the rear hatch.
When you hit the driver side switch it unlocks the front doors just fine.
Go to the driver side fuse pannel.
Learn about this problem why it occurs and how to fix it.
Gmc yukon power door lock actuators may fail 236 reports.
I had the right rear door lock on my 08 denali go out last year they replaced the solenoid.