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Chris (aka-Moose)
Chris (aka-Moose), Technician
Category: Chevy
Satisfied Customers: 44476
Experience:  16 years of experience
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I'm having trouble programming a new key remote I bought. It

Customer Question

I'm having trouble programming a new key remote I bought. It won't allow me to program it which is super frustrating because it's brand new and the current one I have is nearly broken. I have a mid-2000 chevy trailblazer.What happens:
When I complete the instructions for programming and finish by holding down the unlock button on the panel, the car does beep twice indicating that it's entering programming mode, but then within a few seconds it beeps again indicating it's leaving programming mode. The description of this exact problem is detailed here:http://gmtnation.com/forums/threads/problem-programming-key-fob.5815/No one in the thread seemed to have found any kind of solution. I was hoping that a professional mechanic on this site would be able to find a solution.
Submitted: 1 month ago.
Category: Chevy
Expert:  Chris (aka-Moose) replied 1 month ago.

Welcome, I'm Chris (aka Moose), my normal schedule online is around lunch and after dinner past midnight.

  • Sorry no one has helped yet.
  • I can help with this question.
  • Reply and let me know when your able to work on this concern.
Customer: replied 1 month ago.
Well give me the instructions now. I'll try it tomorrow and get back to you immediately after.
Expert:  Chris (aka-Moose) replied 1 month ago.

Can I get the year model of the vehicle?

Customer: replied 1 month ago.
2005
Expert:  Chris (aka-Moose) replied 1 month ago.

I need to confirm you are following the exact steps for programming. Look them over in the file below and report back.

https://dl.dropboxusercontent.com/u/90220402/trailfob.pdf

.

Prior to completing the mandatory rating at the top of your screen. Let me know if I have not yet provided you with ~5 STAR EXCELLENT~service. Reply and let me know in more detail what you need to be pleased with my help.

Thanks Chris

Customer: replied 1 month ago.
sir! Between steps 5 and 6 is when the problem I described shows itself. Instead of locking and unlocking and beeping once, after about 3-4 seconds it locks, unlocks, and beeps a SECOND time, which I've read is an indication that it's leaving programming mode.
Expert:  Chris (aka-Moose) replied 1 month ago.

Based on step 10 the LGM needs to be replaced because the module will not enter programming mode.

https://dl.dropboxusercontent.com/u/90220402/LGM.pdf

Customer: replied 1 month ago.
Ok. Could it be anything else, or are you close to 100% sure?
Expert:  Chris (aka-Moose) replied 1 month ago.

I can only be sure if I have the results from you doing each of the tests. Rarely ever are manufacturers diagnostic steps wrong if all steps are done in order and correct.