08 chevy impala door locks. Will replacing accuator resolve the problems with couple doors not responding.

Yes? No? Maybe?

A little more info......this a 4 door?

Do some doors work? Which ones?

The ones that don't work, do the lock? Unlock? Or do neither?

Do you have keyless entry? If yes, do you have the same results as hitting the manual switches?

You can easily tell if an actuator works....you have to remove the door panel, disconnect the harness to the actuator, and attach a test light to the harness....then operate the switch to lock and unlock the actuator....the test light should turn on for both lock and unlock......if the test light does this, then the actuator is bad....

Unfortunately, that test is about the only one you can easily do........

Everything goes through the BCM, and the easiest way to diagnose this system is with a high end scan tool that can read BCM data and codes( "B" codes).....