I'm having an issue with the rear hatch locking mechanism.

2004 CHEVROLET TRAILBLAZER
129,000 MILES • 4.2L • V6 • 4WD • AUTOMATIC
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BANGSTER9
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I am unable to unlock the rear hatch using the keyless entry or the button on either front door. I was able to access the locking mechanism and manually unlock the hatch. I removed the paneling and discovered that the electric module( p/n 15206805) was making a steady clicking noise as if the message to unlock or lock was received but it was unable to send the message on to the second module located right next to the latch. It is my belief that if I purchase the module making the strange sound that my problem will be resolved. However I am merely a backyard mechanic and hardly an electrician. I read a forum about this same problem and followed the instructions given in the feedback, which was to clean and grease the latch an it did not solve the problem. So what's next?
Jun 21, 2014 at 4:41 AM
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HMAC300
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have a pro program the module so it will work with your security system as well as your key fob
Jun 21, 2014 at 5:55 AM