04 Chevy Silverado Crew cab rear doors unlock but do not lock...

[brianjc9]

The rear doors do not lock, but they do unlock with either the remote or the lock button on the driver's door. Also, they do not autolock when the car starts moving over the set limit (i think 15 mph in drive).

The problem is that if I lock them manually, next time I park and take the keys out they will unlock. This is happening with both rear doors.

I have checked for blown fuses in the fuse block of the cab with no luck. Any suggestions?

[j cAT]

Originally Posted by brianjc9

The rear doors do not lock, but they do unlock with either the remote or the lock button on the driver's door. Also, they do not autolock when the car starts moving over the set limit (i think 15 mph in drive).

The problem is that if I lock them manually, next time I park and take the keys out they will unlock. This is happening with both rear doors.

I have checked for blown fuses in the fuse block of the cab with no luck. Any suggestions?

this is most likely a relay...the feed should be the same lock/unlock..if you have the auto lock unlock in operation working since day1 ........... the relay is most likey shot..