2017 SLT 1500- 4 actuators bad at once

Tacotruckholler · September 28, 2022

Hi All,

I will cut to the chase; I had my evaporator replaced at a GMC dealer and now my passenger, both rear doors, and locking tailgate do not work. They don't work with Key fob or door controls. Everything else (windows, etc) works as intended, including drivers door lock.

Any ides what could have caused this? Maybe a pinched wire when they installed the dash back? Possible electrical short? Dealer is saying that it's nothing that they did...and I find that hard to believe.

Thanks in advanced!

Ronnie Jones · September 28, 2022

I don't know if it's related bug the same thing just happened to my son out of the blue in his 2000 bonneville he had a leak from somewhere and it got the floor under the driver's seat soaked and there's a wire harness connection under there that got wet. So none of the electric door locks or windows work. It happened all at once.

newdude · September 28, 2022

11 hours ago, Tacotruckholler said:

Hi All,

I will cut to the chase; I had my evaporator replaced at a GMC dealer and now my passenger, both rear doors, and locking tailgate do not work. They don't work with Key fob or door controls. Everything else (windows, etc) works as intended, including drivers door lock.

Any ides what could have caused this? Maybe a pinched wire when they installed the dash back? Possible electrical short? Dealer is saying that it's nothing that they did...and I find that hard to believe.

Thanks in advanced!

Dealer needs to take a look. Something is either unplugged or damaged from doing the evaporator. Could be a broken wire, the BCM might have a loose plug, if they took the doors off (which does have to be done on certain vehicles to get the dash out) they could have a bad connection at the door jambs as well.

If they worked when you dropped it off and don't after picking it up, its on them.

Edited September 28, 2022 by newdude

Yotaman · September 28, 2022

Check the fuses first. Make sure they are good and that they are there.

Yotaman

Tacotruckholler · October 8, 2022

On 9/28/2022 at 10:44 AM, Yotaman said:

Check the fuses first. Make sure they are good and that they are there.

Yotaman

Fuses are all good. Ive checked all of them (driver side, passenger side, and engine compartment) twice.

Tacotruckholler · October 8, 2022

On 9/28/2022 at 9:05 AM, newdude said:

Dealer needs to take a look. Something is either unplugged or damaged from doing the evaporator. Could be a broken wire, the BCM might have a loose plug, if they took the doors off (which does have to be done on certain vehicles to get the dash out) they could have a bad connection at the door jambs as well.

If they worked when you dropped it off and don't after picking it up, its on them.

While I know the dealer did something, I cannot yet prove it. I opened a case with GMC, and they dug in and spoke with the dealer. GMC tells me that "dealer said that they did not do anything to the door locks or anything that could effect the door locks so there is nothing we can do." So it looks like I am on my own.

I pulled the tailgate cover off and test the power going to the locking tailgate actuator, and there is none- so I have confirmed its electrical related, and not just 4 bad actuators. I have also discovered that the passenger door lock/unlock control works the driver door, but still not passenger door or other rear doors.

I wish I knew more about these wiring of these trucks so that I could dig deeper, but I am pretty much at my intellectual limit. Ive check all exposed wiring harnesses to ensure they are firmly plugged in. I am not sure what else to do besides taking it to dealer again.