Any Keyless Entry Keypad experts?

[todd308]

When I got my 21' AT4 the dealer installed the Keyless Entry Keypad, and gave me the card with the Master Code.   To be honest months went by and I never really messed with it aside to verify the master code worked, but the other day I thought I'd actually set a code on it. 

 

I used the Master Code on the card and it unlocked the door as expected. Then I tried to set a new personal code (holding 1/2 after putting in the master code, then my personal code), and it has not worked since.  Not sure if I didn't hit the code I thought when I was reprogramming it etc.    The odd part is from what I can tell from the FAQ on the GMC page for the accessory, the Master code should always work, even if you set a personal code.  Mine no longer responds to the master code.   

 

Q: What do I do if I can’t remember my five-digit code?
A: The included wallet card contains a five-digit master code that will unlock the vehicle in the event you should ever forget your personal five-digit code.

 

(They really should give you the info on the FAQ page, the instructions on the back of the master code card are worthless)   I talked to the dealer and they said the master code should work all the time and they had no ideas. 

 

Anyway it seems to be a brick right now, but it still does talk to the truck, as I can still lock the doors with it.    The FAQ talks about the unit locking itself out for increasing amounts of time (more wrong entries the longer the lockout) but that seems to only be if you put in 16+ wrong entries in short time periods to stop scanning attacks, and the orange light is not flashing on mine indicating it's locked out. I didn't mess with it over the weekend and the master code still won't work.   Seems like a silly thing to take it back to the dealer for, so I thought someone might have some ideas. 

 

Thanks