Removed from 2008 Chevy Avalanche LTZ, fits many GM Vehicles, will need motor replaced, would suggest Gruven Parts they sell a replacement motor that is stronger then OEM, buy this one and do the motor swap then switch it out with your bad one for low down time. Again the electric motor that opens and closes the lock is bad, it was working intermittently when it got hot outside. This part number was replaced by part number 25876385.  Please see pictures and ask any questions you may have as this is sold for parts not working and there will be no returns.