CHEVROLET DOOR LOCK NOT WORKING

The Door Power Locks Work For The Back Doors And The Back Passenger Sliding Door, But Not For The Two Front Doors. Thanks

I Have An Issue Where If My Power Locks Are Bumped, It's Very Difficult To Unlock My Truck. Sometimes I Have To Hit Them Several Times...

Purchased Vehicle And Driver's Door Lock Did Not Work. Passenger Door Locked Worked When Pushing Switch On Driver's Door Switch...