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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15133
Experience:  GM Grand Master Technician 2007. 14 years experience.
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I have a 2005 trailblazer. I can't program new car remotes.

Customer Question

I have a 2005 trailblazer. I can't program new car remotes. I follow the instructions for programming perfectly found online and with the company that sold me the remote. There seems to be an issue where once the car enters programming mode by locking and unlocking the doors and sounding the car horn, that only a few seconds it automatically leaves programming mode, signaling the same way, locking and unlocking and sounding the car horn.What's wrong? This seems to be a somewhat common issue, because I saw an online car forum that discussed this, but they found no solution. They determined that the alarm system was aftermarket, but mine was purchased brand new from the dealer.
Submitted: 9 days ago.
Category: Chevy
Expert:  Eric replied 9 days ago.


Are you keeping the unlock button held down or releasing it after a couple of seconds?

Customer: replied 9 days ago.
I've tried every both. I've tried everything I can possibly try, really, as far as the way that I do the programming procedure.
Expert:  Eric replied 9 days ago.


Are the remotes you bought factory GM or aftermarket?

If aftermarket, what brand?

Customer: replied 9 days ago.
Aftermarket. Brand is BestKeys
Expert:  Eric replied 9 days ago.


Ok, I will have to opt out as I dont have their programming directions. If another expert does, they will post here