A little back story first,
I'm the original owner, The car only has 25,152 miles on it. the car sat in my driveway covered for 2 years, because of a water leak. I finally decided to fix her up, since being retired now and needing something to do. The body is in perfect condition, the interior needed a lot of cleaning. First thing I had to replace was the battery and she cranked up fine. engine running smooth. when I tried to put into reverse to back out, the shifter was stuck. problem 2, I had to replace the shifter. I took it for a drive and had the oil changed and all was good. problem 3, the water leak. turned out to be a combination of the sunroof drain and the cowling water deflector under the hood. water leak fixed and tested 3 times running thru the carwash. problem 4, it was a cold day, so I turned on the heat. but was not getting any air. I checked the blower and found it had rusted frozen from the water leak. replaced it, works good. Now everything is working except the fog lights. problem 5. I tried everything, checked wires, bulbs, switch, fuses and the relay. after 4 days, I gave up and took it to the dealer. They told me that that the Body control module was damaged from the water leak. had the BCM replaced and reprogramed. fog lights now working.

Now the new problem #6 that's killing me. all four door locks are not working with the fob or the lock switch on the doors. the fob works, (horn beeps, alarm sets and auto engine start) the door locks do nothing. I checked the fuse and it is ok (replaced anyway). in all of my reading, I have found that the door lock relay is part of the BCM and can not be changed. FYI--the fob will lock and unlock the lift gate. The dealer says that the BCM is good and that the door lock actuators are bad on all doors. it is highly unlikely that all four stopped working at the same time. Before they changed the BCM, all door locks worked o.k. I need help in troubleshooting this, so that i can prove that they put a defective after market BCM in my car. please help, A Big thank you in advance for the help.

 

Welcome to the site, my thoughts are somebody didn’t program the BCM and or the fobs. The dealership should fix that no charge for you.

 

When was the BCM replaced in this timeline? Exactly why, what damage? Why isn't whoever did the work standing behind it?
The lift gate lock is on a different relay. Look om yje driver side wheel hump, that mysterious box is the controls for the lift gate.
I would start by seeing if there is a ground signal getting sent to the doors.
Here is a pdf of the door lock wiring.
2006doorlocks.pdf

 

He says why the BCM was replaced

I gave up and took it to the dealer. They told me that that the Body control module was damaged from the water leak. had the BCM replaced and reprogramed. fog lights now working.


wondering if the fobs should have been relearned after the BCM was replaced

 

The water leak from the cowling caused the damage to the BCM and blower motor for the ac. it was just replaced, I picked up the car today. I will try to check the ground. I just thought it was strange that they all stopped working after the BCM replacement. Thanks for the info.

 

The fobs are working, it makes the horn sound when the doors lock, but the locks do nothing. Also, none of the door lock switches on the inside are working.

 

I too struggled with door locks. The failure was gradual. They also seemed to stick. Sometimes, blew fuses.

Do you hear any noise at all? Did any of them ever operate part way? Can you operate the locks with the manual buttons? Do they seem stiff?

Have read about pinched wires under the seat. Mentioned in these forums.

Could be your harness has a corroded pin somewhere.

My 2010 and 2011's operate with considerably more "authority," making me think something changed in the design. Heavier wires? Stronger actuator? Never looked into p/n changes.

Would be advisable to study the wiring diagam.

 

Thanks for the response. like i said before, all of the door locks worked until they changed the BCM. I can pull and push the locks very easy. I get no response from any of the interior manual door switches.

 

https://fuse-box.info/chevrolet/chev...uses-and-relay

Check fuse #26 in the interior fuse box, is it possible it’s either loose or the fuse blew for some reason?

 

What was the evidence of damage to the BCM????????? It is a sealed unit. We have heard thousands of leaking butyl patches with no damaged BCMs that I recall. "the dealer said" is not a why. My experience is the dealer mechanics knows less than the bag lady down by the river. If it isn't bolted on they can't fix anything.
I can understand a blown fuse or some corrosion but the computer is encased in epoxy. The lot boy could clean the corrosion.
Does the lock all button on the driver door work?

If the locks worked before but not after; whoever did the work is responsible. But I supplied the wiring diagram so you can troubleshoot, all of the wires involved are visible around the BCM. I think the relays are Solid State, so unlikely to be bad on a NEW BCM.
It is possible they did not program correctly.
It is possible that some wire got compromised.
It is possible that all 4 actuators went bad from sitting in a humid tent for 2 years.
It is possible that varmints chewed on wires.
It is possible that the grease in the actuators globbed up from sitting for 2 years.