door locks

nycdesignkid · July 12, 2005

Hello,

As stated above, I noticed my rear and tailgate locks won't lock. I believe this has been like this for quite some time but only noticed now. When locked manually, the locks will all unlock. This is the case whether I use my remote or lock from inside the truck. Is it a blown fuse or something more? Thank you so much in advance!!

GM-Tech · July 13, 2005

How 'bout giving us a clue as to what year and model truck it is.

nycdesignkid · July 13, 2005

How 'bout giving us a clue as to what year and model truck it is.

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sorry...2003 GMC YUkON

GM-Tech · July 13, 2005

The rear doors operate by a different method than the front driver/passenger door. The rears have a lock relay and an unlock relay. Power is from the same fuse, so it's not a fuse if unlock works. Possibly the relay, which is in the panel on the left side of the dash.

Pull that panel off the end of the dash on the left side and you'll find the relays back there. You could probably swap the lock and unlock relays and see if they will now lock but not unlock.

nycdesignkid · July 13, 2005

The rear doors operate by a different method than the front driver/passenger door. The rears have a lock relay and an unlock relay. Power is from the same fuse, so it's not a fuse if unlock works. Possibly the relay, which is in the panel on the left side of the dash.

Pull that panel off the end of the dash on the left side and you'll find the relays back there. You could probably swap the lock and unlock relays and see if they will now lock but not unlock.

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Thank you so much for replying!! I'll check now!!