Power windows stopped working in my 01 Denali

Your question as stated is missing clarity.

Do you mean power lock buttons were functional but automatic lock/unlock stopped working. Then after removing and reinserting the lock fuse, none of the lock functions work?

The BCM controls activation of all the lock actuators. The power lock/unlock buttons at the doors request the BCM to power the specific door lock with the appropriate polarity to lock or unlock. Further, the BCM has inputs from the ignition switch and the transmission selector to issue the operator programmable automatic lock/unlock.

The typical single point of failure for all door locks is the drivers switch assembly, but it requires several troubleshooting steps to isolate other potential faults.

Sounds like it could be a defective body control module.

As per this problem,there are help links provided to troubleshoot the exact cause of problem.Click the link below to go through the procedure :----Diagnosis & Testing Power Windows? http://repairhelpcenter.blogspot.in/2012/02/diagnosis-testing-power-windows.html----------
Door locks or windows not working on car?
http://schematicsdiagram.blogspot.com/2011/07/door-locks-or-windows-not-working-on.html
------------Car windows will go down but come right back up
http://schematicsdiagram.blogspot.com/2011/06/car-windows-will-go-down-but-come-right.html

Electric Window Motor REMOVAL and INSTALLATION ?
http://schematicsdiagram.blogspot.com/2011/06/electric-window-motor-removal-and.html
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Driver side power window wont go up on ford expedition?
http://howtobyme.blogspot.com/2011/10/driver-side-power-window-wont-go-up-on.html

How to replace window motor and regulator on jaguar S-Type?
http://howtobyme.blogspot.com/2011/09/how-to-replace-window-motor-and.html

How to remove window motor and regulator?
http://howtobyme.blogspot.com/2011/09/how-to-remove-window-motor-and.html
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power locks, power window and power mirror on the passenger side not working ?
http://howtobyme.blogspot.com/2011/09/power-locks-power-window-and-power.html
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All power windows not working?
http://howtobyme.blogspot.com/2011/09/all-power-windows-not-working-on-2003.html
-----------Power windows works intermittently? http://schematicsdiagram.blogspot.com/2011/12/power-windows-works-intermittently.html
--------Power window fuse location? http://schematicsdiagram.blogspot.com/2012/01/power-window-fuse-location-for.html
----------Power windows will not go up and relay clicks when switch is pressed? http://technoanswers.blogspot.com/2012/01/power-windows-will-not-go-up-and-relay.html
----------Keyless keypad on drivers door stopped working?

http://technoanswers.blogspot.com/2012/01/after-alternator-failure-keyless-keypad.html

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Remote will not unlock Rear door ?
http://schematicsdiagram.blogspot.com/2011/12/remote-will-not-unlock-rear-door-on-gmc.html
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Door locks or windows not working on car?
http://schematicsdiagram.blogspot.com/2011/07/door-locks-or-windows-not-working-on.html
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Car door will not close?
http://howtobyme.blogspot.com/2011/11/car-door-will-not-close.html

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All power door locks not working on?
http://howtobyme.blogspot.com/2011/11/all-power-door-locks-not-working-on_14.html
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Repairing car Door lock Actuator?
http://howtobyme.blogspot.com/2011/11/repairing-car-door-lock-actuator.html

How to Access car door panel?
http://howtobyme.blogspot.com/2011/11/how-to-access-car-door-panel.html

Vehicle door panel components?
http://howtobyme.blogspot.com/2011/11/vehicle-door-panel-components.html
----------Front Door dis-assembly diagram?

http://repairhelpcenter.blogspot.in/2012/02/front-door-dis-assembly-diagram-for.html

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Rear Door dis-assembly diagram?

http://repairhelpcenter.blogspot.in/2012/02/rear-door-dis-assembly-diagram-for.html

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How to test Power door locks? http://repairhelpcenter.blogspot.in/2012/02/how-to-test-power-door-locks.html
--------This will help.Thanks.

there should be a relay and a fuse for the locks and the windows

check the fuses it may be the window motor or the main power switch and the dealer has to repromgram it there is a speacal gm tool for that.

Check the buttons.. I have an 06 Grand Prix with the Remote starter on the top and it seems that the conductor on the buttons worn out.. Take the keyfob apart, pull the rubber buttons off the chip, lick your finger and touch the place where the unlock (right side of the fob) would be. That should unlock your doors. I just did it with mine. I would just buy another fob on ebay and change the buttons out.. Hope this works

both the rear passenger side wont unlock ???? How many doors are on the passenger side ? Or both back doors don't unlock ? Two relays lock / unlock the back door's Not the lift gate . The BCM controls the relay's . The relay's are located in the rear fuse box . Under back seat .

if you can here relays when unlocking/locking check for power at door lock actuators inside doors, if you have power on lock/unlock and good earth from connector actuators are faulty.
if no power on test light when operating check output from central door lock module while operating, none coming out of module then it might need replacing.
check 30Amp power fuse for main relay under bonnet (which goes to pin 8 white/blue on module)and 10Amp gauge fuse in cab(pin 1 blue/red on module),pin 15 is also power when relay is on(red/blue) with test light, and module/ actuators.
check outputs from module pin 3 & 4
blue/red
blue/black
that go to door locks

that is the interior lights and alarm,remote module

happened to me once. the fuse for it was blown. $3 fuse replacement. check the fuse box & manual for this component. the fuse removal tool is located inside the engine fusebox area, and the fuse for the lock is inside the driver side box.