Please help- Mystery key fob programming issues

murphys_law93 · February 15, 2019

Hi, new member here! I've read a lot of helpful posts on this site and decided to join.

It appears that by means of motor vehicles, some force in the cosmos is hell-bent on driving me insane, as every ridiculously simple process must be infinitely difficult and dreadful.

Today's ridiculousness involves programing a key fob in my 2006 Silverado Z71 4x4. I've had the truck a couple weeks and it came with no key fobs. I decided to buy 2 from Amazon after noticing the truck has the AU0 RPO code, as well as power unlocks/windows, and no key cylinder on the passenger door.

I've read the process online, watched youtube videos, yet when I try I am unsuccessful, and can't find anything related to the issue I am having.

So here's the process:

-key out, door open, sitting in driver seat-

-shut door, insert key. Push and hold unlock, turn on-off-on-off (I've also tried on-acc-on-acc per some advice from another post on this forum). The moment the key passes the "ACC" point on the ignition cylinder the 2nd time, the doors locks cycle, and I release my finger from the unlock (exactly the same as every video I've seen on YouTube".

The issue is, about 2-3 seconds after the door locks cycle and I've released my finger from the unlock button, the door locks will automatically cycle a 2nd time, and the horn will beep once. No matter how long I hold the lock and unlock button on the remotes, there is no response from the truck and the fobs will not work.

Interestingly enough, no matter how carefully I perform the sequence or even if I'm trying to botch it, I get the exact same results. The door locks will cycle normally, then 2-3 seconds later cycle again and beep. This happens whether the driver door is open, or shut, or even if I have the truck on before starting the process. If I press the unlock-lock in the truck a million times after I release my finger, or if I just keep holding, no matter how many times I've tried releasing the unlock at different times, if I pour gasoline all over the driver door and set it on fire, drive it into the lake and perform it underwater holding my breath, it doesn't matter and I get the same response from the truck.

No check engine lights, no security light issues, no abs lights, nothing else at all that suggests there's any wiring issues with the truck, everything works as it should.

I have found one other post on the entire interwebz with someone having the same issue of the door locks cycling a 2nd time and the beep, but no helpful responses or solutions. So, has anyone ran into this issue before or have any advice? I'll be posting a video on youtube and adding the link later. Picture of RPO sticker attached.

Thanks!