How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Mike S. Your Own Question
Mike S.
Mike S., ASE Certified Technician
Category: GMC
Satisfied Customers: 7433
Experience:  GMC N.A.I.S.E. Certified Auto-Mechanic
Type Your GMC Question Here...
Mike S. is online now
A new question is answered every 9 seconds

Cam, I'm ***** *****. I just installed new front speakers in

Customer Question

Hi Cam, I'm ***** *****. I just installed new front speakers in the doors of my 2006 Sierra 1500. Now there is no power to the door controls on either side. Power lock don't work and buttons don't light up. Also the dome light now stays on when I drive and I can't shut it off. The key in the ignition chime goes off and I turn the truck off but haven't opened the door. I checked all the plugs to the power window door controls and rhey are correctly reinstalled. I'm stumped.
JA: Thanks. Can you give me any more details about your issue?
Customer: There is no power to the doors at all. No lights in buttons or corner courtesy light.
JA: OK got it. Last thing — GMC Mechanics generally expect a deposit of about $18 to help with your type of question (you only pay if satisfied). Now I'm going to take you to a page to place a secure deposit with JustAnswer. Don't worry, this chat is saved. After that, we will finish helping you.
Submitted: 1 year ago.
Category: GMC
Expert:  Mike S. replied 1 year ago.

Cam is either offline or away, might I be of assistance.

The first thing to do is obtain a wiring diagram of that circuit, so I will need some more information in order to look that up.

Is this the sub-model WT, SLT, SLE, etc and which engine came in this, the 4.3, 5.3, etc and is it gas or flex?

Customer: replied 1 year ago.
SLT 5.3l gas 4-door
Expert:  Mike S. replied 1 year ago.

One more thing, is this the base or up level power doors/

Anyhow, here are all of the power door lock wiring diagrams, start by checking the fuses.

Expert:  Mike S. replied 1 year ago.

I will be back in just a moment.

Customer: replied 1 year ago.
Thanks. I'll check fuses and see. I'm not sure but I think it's base level locks.
Expert:  Mike S. replied 1 year ago.

Ok, be sure to let me know the results.

Customer: replied 1 year ago.
Hi Mike. I have checked all fuses and they are all good. I did a reset of the bcm by disconnecting the battery and bcm connects. That was able to get the dome light and key chime to recognize when the doors are closed so that has been corrected. However, I still have no power to either of the front doors. The wire diagrams you sent have been a big help so thank you. I'm just wondering what the next step would be since the fuses have checked out. Thanks for your time. -Eric
Expert:  Mike S. replied 1 year ago.

Did you actually test both sides of the fuses using a voltmeter or at least a 12 volt test light?

If not, that would be the next step, and continue testing fuses when asked and not just looking at them.

You say there is no power to either side door controls. May I ask which color wires have no power?

Expert:  Mike S. replied 1 year ago.

It's possible there is one of those 3 relays that are bad. Hopefully we can figure it out by the results of a few tests.

Expert:  Mike S. replied 1 year ago.

Also, if you have a scan tool it may save us some time to retrieve the codes from the bcm.

Customer: replied 1 year ago.
Ok thanks. I'll work on all that next.
Expert:  Mike S. replied 1 year ago.

Ok, once you know the color of the wires, let me know and if you have any spare relays in either fuse box, also let me know if you swap any relays.