Key wont open door on Chevy Colorado, only remote entry works. Even duplicate key doesn't work. Battery fine.
Try spraying some wd40 into the lock loads of it and keep turning the key left to right might free off.
Or it could be a rod inside the door has come off so the lock wont move to unlock, the central locking has a motor to open the door that is not attached to the rod so it can work without the lock.
Take the door card/trim off and have a look at the rear of the lock, should have 1 rod for the handle, 1 for the lock mechanism and another for the inner handle. some are cables but most are rods
It might just have came off the back of the lock, they use very small plastic clips to hold the rod in place, when it gets cold the crack and fall off so the rod fall's out.
Hope this helps
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