My 2005 Chevrolet cobalt driver side manual roll down window will not roll completely down. It only rolls about 3/4 way down and then I hit resistance. When I click the unlock/lock button on my keys the driver side door will not lock/unlock. It makes a grinding noise. I can manually lock and unlock the driver side door fine though.

Window regulator$60 $70 look on eBay usually the cheapest easily changed with the slightest mechanical skills pep boys will do em usually around $100

New switch for the passenger side. The drivers side switch may be wired through the passengers side switch witch will make it not work if the passengers side switch is bad. Just a thought. Hope this helps.

If the passenger side switch is bad it wont complete the circuit to operate the window. Recommend trying a known good passenger switch.

Yes there should be a stop if the window is power. You may be missing a guide also.
Someone will need to pull the door panel off and take a look at the tracks.

You have to check the switch, that is most of the time the problem. If not the motor on the window

more than likely off the track. have you pulled the door panel off to see?

replace the switch. They have parts made of plastic pressing on the contacts softing these babies up making them useless in a few years

The most likely cause is that the window motor has gone out. Is the car still under warranty? One way to check the motor is to turn the ignition on, don't start the engine, then try to operate the window while watching the dome lamp. If the lamp dims when you activate the switch, it is most likely the window motor. If not then next likely cuplprit would be the switch.

The regulator is burnt out and you need a new one. I would just replace it.

sounds like bad window regulator. could also be window switch,or broken wire between door and body