SOURCE: 99 alero rear doors locked wont open
Your rear doors probably have a child safety lock on them, there should be a switch somewhere that can be shut off, as far as where it is... couldn't tell ya, try calling dealer
SOURCE: 99 Oldsmobile Alero Door Locks
that's probably just bad spares. try going to a different store to have them cut (hardware stores are a good place to go) or you could go to a gm dealer too.
SOURCE: Automatic door locks on 1999 Alero don't work
look for the lock and unlock relays check them to see if they work.what you do is look at relay.look at terminal blades.you have a number 86 and 85 terminals on relay.connect terminal 86 with a jumper wire to positive battery terminal.then connect 85 terminal to ground with jumper wire.if the relay click its good. if not replace it.if relays is good you have bcm problems it control door locks.dealership job.
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