One of my rear seatbelts is locked solidly in the "in" position. I've jerked on the thing with all my strength and body weight and it won't come out. What needs to be done to loosen it up or even replace it?


The baby lock is where you pull the seatbelt all the way out and then release it all the way back in then when you pull it out the next time it won't go back in.
To release and go back to normal just pull the belt all the way out and it will return to the normal mode.
So...nearly a year and a half later 4X4HIGH was correct. The driver side seatbelt connector was upside down when you laid it out flat on the seat as it came out of the mechanism/housing. The GM button was down where as the passenger side faced up...which seemed correct.That usually happens if the belt is twisted as it retracts. I've had mine do that from time to time when people get the belt twisted as they let it retract and i've been successful at getting it freed up by gently tugging on it then releasing doing it several times in succession.