I have a Defiant Electronic deadbolt from home Depot. model G1X2D01. ive lost the manual and i need to delete some old codes from it.

Snap off the back cover (opposite where you punch the numbers) by pinching the sides and pulling off. Do not press a pen or anything into the small light, you do not need too. Just pinch and yank off cover. You will see a small light and beside it is a small SET button by the batteries, it is labelled.. Press this Set button for 2 seconds. The red LED will light on the front code side and beep twice to indicate you are in programming mode. Enter your current code that you want to change (factory set is 12345) and then press the button that looks like a little lock on the keypad. Enter the digits "10" and press the lock button again. Enter the new code (must be six digits) and then press the lock button again. The red light should go on continously for 10 seconds. The code should be effective.
Note: if you have problems like we did, you can also remove one battery and press the "set" button simulataneously when you reinsert the battery. This resets the factory code of 12345. Then you can start over. For some reason our old code was only 4 digits, but it would not let us reprogram a 4 digit code. It didn't work until we did a 6 digit new code.

For this particular Defiant model:

To delete an individual existing user code:

1. Press SET for 2 seconds. Red light will turn on, beeps twice, and you're now in Programming Mode.
   
2. Enter your programming code then press the Lock button (lock "icon").
   
3. Enter 30 (3-then-0), then press the Lock button.
4. Enter the code you wish to delete, then press the Lock button.
   
5. Red light stays lit for 10 seconds.
   
6. Existing user code is now deleted (you can test to see if the code still works)
   

1. Press SET for 2 seconds. Red light will turn on, beeps twice, and you're now in Programming Mode.
   
2. Enter your programming code then press the Lock button (lock "icon").
3. Enter 40 (4-then-0), then press the Lock button.
   
4. Press the "C" button for 3 seconds (I think the C stands for Cancel). Green light will turn on with a single beep.
   
5. Red light stays lit for 10 seconds.
   
6. ALL user codes are now deleted (you can test to see if the codes still works).
   

1. Press SET for 2 seconds. Red light will turn on, beeps twice, and you're now in Programming Mode.
   
2. Enter your programming code then press the Lock button (lock "icon").
3. Enter 20 (2-then-0), then press the Lock button.
4. Enter the new user code (4-6 digits), then press the Lock button. Max number of storable codes is 10 according to manual.
5. Red light stays lit for 10 seconds.
6. New user code is now added (you can test to see if the code works)