Saldog

Thank you for the prompt reply, I am surprised to hear that.

I want to install a trailer brake controller on my 2014 GMC Sierra 1500 SLT Z71 with the 5.3, it has the 3.42 rear end. I like the looks of the factory brake controller (mine does not have it) and I would like to go that route....do you know if the factory wiring is located behind the panel where I can purchase the necessary controller and dash molding and install a factory brake controller? I did a search for this topic and did not see this come up anywhere else. Any info would be helpful. Thanks, Saldog

I had a similar vibration on my 2014 SLT Z71 with the 20 inch wheels. The dealer checked it and replaced two of the tires, it fixed the heavy vibration.... Still have a slight vibration when I first start out on the highway to work, but fortunately it smooths out after about a half mile. I do get a vibration when it transitions to V4 mode, which is not that often that it goes into the 4 cylinder mode. I have the same SRA Goodyear tires on my wife's 4runner and they are smooth but wet weather and snow traction are not as good as other tires we have owned. I did notice the rear drive shaft diameter for our trucks is pretty big, it looks like it might be aluminum. I wonder if it is aluminum and they had to increase mass for strength and it is creating vibration problems.

As GMC-AT mentioned awhile back you are fortunate that the dealer is replacing you're headlight assembly since GM advises specifically not to do so unless a lamp assembly failed...great they did that for you. I met with the owner of the dealership where I purchased my truck and they swapped the headlights out with the headlights from his truck, I really appreciated he did that...hopefully this solved the fogging issue. I still think GM needs to come up with a solution. I did receive a call from Valerie a customer service manager, friendly but no change from GM, this fogging is normal. She did advise me to keep all documentation pertaining to this from the dealership (GM will not provide written documentation) to have it for any future problems. I am going to send a letter to the CEO of GM and also to the NHSTA regarding this problem, it needs to be fixed. It would be nice if GM would place a label on the window sticker saying "Interior headlight lens fogging is normal" that way we know about this ahead of time and can decide to live with it or not.

I started with the Dealer on December 23rd, 2014 where I purchased the truck from and they were informed by GM that this is a normal condition for condensation in the headlamps and the dealership would be on their own to absorb the cost of replacing the head light assemblies. The Dealership did offer to swap them out from another truck on their lot, however, I advised them I appreciated the offer, GM should be held accountable for replacing these units. I sent a letter to Duncan Aldred U.S. Vice President of GMC informing him of my concerns with this headlight issue, I requested a written response to the problem on January 12, 2015. To date I have spoken with four different people from GM (they will only communicate by phone due to proprietary information) that this is normal, and they can't explain why. They will not provide a written letter or email response to this issue, and no reply at all from Duncan Aldred. This Thursday February 19, 2015 I am meeting with the owner of the dealership where I purchased my truck to advise him of my frustration with GM and how poorly they have handled this situation, I am going to encourage him to inform GM that this is very poor customer service. I am glad to hear some of you were able to resolve you're headlight replacement with such ease, I wish mine went as smoothly. I did not become a member of this forum to complain, but, to encourage a solution by advising those that are having similar problems to speak out about it to GM and force them to come up with a "fix" to this moisture/condensation problem with their head light assemblies. When I made my truck purchase I was open to all makes, I have owned two Dodge Ram 1500's the last 17 years and they are good reliable trucks. I am not a diehard GM, Dodge, Ford, or Toyota guy. I read about the CEO's and the direction they were going with the company and what were their long range plans. I evaluated towing and payload specs, interior layout, safety, and styling. I settled my decision on the GMC, the exterior styling really appealed to me and I think the recently appointed CEO, Mary Barra is trying to make GM a better company than they were. She definitely has her work cut out for her with the history of GM's previous management. It would be fine if GM informed me they were trying to solve this problem and when they do they would provide replacement headlight assemblies, even if it took a year to do so as long as they had a solution to the problem and not expect reasonable people to accept a defective design flaw. Not only is this a safety issue; daytime running lights fogged over on a rainy day; the potential need to replace the head lights due to moisture intrusion, along with the appearance of having the really cool looking LED headlights fogged over and the Ford guys at work point a finger at my new truck and say "should have bought a Ford". With this exhaustive dealing with GM and still not coming to a resolution on this problem (currently waiting to hear from a customer service manager), it does make me wonder maybe I should have... Don't ignore this problem and simply live with it, call, email, write and advise GM this is not acceptable, they need to fix it. Good luck!

I am having the same problem with my 2014 GMC Sierra SLT, the lower half of my head lights have interior condensation. GM's recent response is that this is normal and I will have to pay for replacement head light assemblies myself. Unfortunately, GM's customer service department is subpar, transferring you from person to person, no one knows any answers other than "this is normal". I would encourage everyone experiencing this same problem contact GM and inform them you want this rectified, a resonable person would not see this as normal. Document your conversations because GM will refuse to communicate this either by letter or email, they state it is "proprietary" information. They will only fix it if they hear from all of us. Good luck, Saldog