mtwago

Well, it may not be coming from the rear suspension. The dealership thought the noise on my truck was coming from the rear suspension also. But, it turned out to be the transmission. I can't remember what exactly they had to replace and adjust...but it did finally fix it. They had my truck for a month before it was finally fixed. I'm just glad I finally found a dealership that would take the time and put in the effort to find it. Because as I've stated before...unless they can blatantly see something is broken, or it involves a service bulletin or recall...most dealerships will not bother looking for the problem.

I have a question for you "thewhitestallion"...do you work for GM?

As I've mentioned in previous posts...I've always been a GM guy as well. I'm 53 years old and have owned at least 20 (if not more) GM trucks (mostly all chevy's) in my life time...and I've never had the issues that I've had with this vehicle...AND IT'S BRAND NEW!! All my buddies have been GM truck guys and several of them have switched to Ford...and they are happy they did. A couple of them were such die hard GM fans, that I could have lost a fortune had I bet they would have never switched...in fact, it was a huge shock. Whether I switch brands or not...I'm not sure...it depends on how GM handles this. I know all brands have their own issues and I've always been told never to buy a first year model vehicle...but I did it anyway, because I really liked the body style...so that is probably a lesson in itself. As for legal action...I will do whatever it takes. I don't want to get legal if I don't have to...but sometimes you have to do what you have to do. And if it gets to the point where GM is not wanting to work with me on trading me out of this truck and into another one...then I will have no choice but to pursue legal action. At that point I will have nothing to loose. Either way, I want out of this particular truck. I think this truck is going to be plagued with ongoing problems. In other words, I think this truck just happens to be one that came off the line that is destined to be a lemon...it's going to be bad karma. Like I said, at least there will be Service Bulletins written because of this situation. One of the most important is the metal shavings that were found in the differential. Their belief, from the evidence and characteristic of metal shavings, is that the manufacturer who builds the differential for GM, actually assembled it and forgot to drill the fill hole and drilled it after the fact. The metal shavings are spiral in nature and obviously made by a drill bit. So if nothing else, hopefully that will help other people. The dealership that has been handling this has been awesome to work with...although it took me taking it to 3 different dealerships before one would actually take the time to look into the problem. As I've mentioned before...this has been an eye opening experience and educational if nothing else...on how GM handles warranty work. I've been told by two different Service Managers from two different dealerships that the reason most dealerships will not take the time to diagnose anything is because GM does not reimburse them for their diagnoses time. So, unless something is blatantly broke or it's a Service Bulletin or Recall...they will not spend any time looking for issues. Because in other words, if a mechanic spends 4 hours looking for an issue...finds the issue and it takes 1 hour to fix...all they get reimbursed for is the 1 hour labor. GM does NOT pay for the diagnoses time...so the mechanic loses money. Either way, this has been a very frustrating experience...the inconvenience of back and forth trips to the dealership...the time missed from work, personal time and so on. I've owned this vehicle for 8 weeks and 4 of those weeks it's been sitting on a lift at the dealership...it's brand new with only 1800 miles on it as I write this post. I'm an Engineer in the private jet aerospace industry and I know if we were to sale a product like this, plagued with these problems...we would be bending over backwards to rectify it...or we would have lawyers crawling all over us. GM should be bending over backwards to address all these issues with everyone that has bought one of their products...especially after our tax money was used to bail them out!

This is a follow up for my popping issue. Well, they finally found the noise. I could write a book here as to what I've been through with this truck. However, to make a long story short...the noise ended up being in the transmission. I could explain it or repeat here what the report says...but I'm exhausted over this issue. The dealership has been in close contact with the GM and their tech department. They have been communicating back and forth with their Engineers...and they finally figured it out!! Getting here to the resolve has been a long drawn out process. To explain that...they found numerous other problems with my truck in the process...and there will service bulletins created as a result of what they have found (they've had to replace the differential, tighten several loose bolts on the body and replace the transfer case...and get this, the new transfer case is leaking so I had to take it back to the dealership today. I've had this truck 8 weeks and I've only been able to drive it for a total of 4 weeks). So, either way...I want out of this truck. In other words, I'm now going to pursue every avenue possible, up to and including legal action to get GM to either replace this truck or take it back. I've been stuck with either a bad truck off the assembly line or it's going to be a lemon for as long as I own it. Supposedly, the GM regional rep is going to be contacting me within the week in order to work out a deal to trade me straight across for a new truck. However, if I don't hear from him soon, I WILL contacting an attorney. As I said, I could write a book here...but I wanted to cut it short. I am angry and exhausted in dealing with this brand new truck. I just hope this helps someone!

I wish I had something positive to add at this point. However, I'm in the same boat so to speak. And get this...my truck has been at the dealership for 3 weeks now..,and it's still there!! They've replaced the differential and the transfer case...and it still makes the noise. They thought they had it nailed when they replaced the differential..because the bearings were shot because there were metal shavings in there from the manufacturer....and apparently it looked to them like the clutches in the transfer case looked burnt...which is the reason they replaced that. So, they thought with all these problems getting fixed that would fix the popping noise. But it hasn't! When I picked this truck up at the dealership it had 20 miles on it and I've babied it since I've had it. I took in it 3 weeks ago with 1700 miles on it. I think I bought a lemon. At least the mechanic and the service manager can hear the popping. And they say it isn't normal and are working diligently on it...and have been in close contact with GM. I know one thing...this purchase of a brand new vehicle has put a bad taste in my mouth about GM. I think they have some serious Quality Control issues. My next new vehicle will be Ford! And the funny thing is...I've been a GM guy all my life!

I'm not sure...but everyone needs to be diligent in dealing with these Dealerships and General Motors in trying to find these issues. Because if you aren't...then they will not do anything about it...until it actually breaks! The problem with that is...by that time it could be out of warranty. It's sad that GM operates this way...especially after we (the tax payer) bailed them out!!!

This is a follow up to this post...and it may concern several people. There was a major find on what could be the answer to my problem. I took my truck to a third dealership (a Chevrolet dealership…even though my truck is a GMC). I had to take it in anyway for the recall on the computer. FINALLY! A dealership that cares enough about customers to go the extra mile. They explained to me as well, how the warranty on a new vehicle works between dealerships and GM…that mechanics get paid by the job…and GM does NOT pay or reimburse them for a diagnosis on warranty work. However, they also explained how their particular dealership pay structure is different from most other dealerships so that the mechanic is not at a complete wage loss for doing a diagnosis…so they spend extra time in trying to find the problem. And, I’m glad they did. And I’m glad the mechanic that is working on it enjoys solving puzzles (his words). AGAIN, THIS IS A MAJOR FIND!! To make a long story short (by the way my truck is still in the shop and will be for the next possible 2 weeks)…their suspicion was the same as mine…that the noise was drive train related. To begin with, they tried different things with the drive shaft…and were able to eliminate any problems there. They tightened a few other things (by the way, my front transfer case mount was loose). Finally, they pulled the cover off the differential. GUESS WHAT…THEY FOUND METALS SHAVINGS…LOTS OF METAL SHAVINGS! They called me in to inform and show me what they had found. They had already notified GENERAL MOTORS! There is a regional Rep on his way there this week. They have documented it and taken pictures. Now for the rest of the story. It appears that the vendor who GM bought this particular differential from had actually drilled the fill hole after it had been completely assembled and left the shavings inside (at least this is their speculation)!! Some of the shavings were curly cue in nature…the way metal spirals when drilled (for anyone that knows anything about drilling or machining metal…will know what I’m talking about). Anyway, they pulled the bearings, gears and everything else and showed me the result. Not only was there a huge amount of play in the gears…but the gears, along with the bearings and races were pitted very badly. They explained that it showed the same wear as a vehicle with over 100k miles on it. MY TRUCK ONLY HAS 1600K MILES ON IT. They went on to explain this will trigger a major investigation with GM…which will more than likely result in a Service Bulletin and/or Recall for all the differentials that were built by this vendor. In the meantime…they are replacing the entire differential…not just rebuilding it or replacing the gears…but an entire differential…casing and all!!! I hope this helps someone else! I know this has been an eye opener for me!!

This is a follow up on the popping noise on my 2014 GMC Sierra. As I mentioned in the above post...I've taken my truck to two different dealerships. Now then, I have become suspicious as to why these guys want to spend NO time on this issue. My suspicion being anything that might involve a GM manufacturers warranty. Because these places had no enthusiasm at all to find the problem. They didn't even try! So, to satisfy my suspicion. I made several phone calls today...I asked two different service managers...from two other dealerships about this...including the dealership I bought it from (out of state). Here is what I have learned about how warranties work between GM and the dealerships. I got these service managers to admit to me (after I blatantly asked) that most dealerships don't have any desire to spend any amount of time on a vehicle if it involves a GM manufacturers warranty. I was told by both guys that the dealerships get paid NO money by GM for diagnosis...and only get paid if they have something that blatantly has to be fixed or replaced...and even then...it's only a fraction of what the average person off the street has to pay. So, unless the issue sticks out like a sore thumb, they do not spend any time looking for the problem. I am ready to cut my losses. I look at it this way...I have 3 options...I can either keep spending time and relentlessly search for the issue...get an attorney to see what my rights are in getting GM to buy this vehicle back, sell it or trade it for different brand of vehicle. I've opened a ticket with GM...but I don't think it's going to do any good. One reason I went with brand new...is for the warranty...but so far that's turned out to be a joke. Anyway, I hope this helps someone!

Well, I think I've had it!!! It's time to cut my losses. I took my truck to a different dealership (Scholfield GMC Wichita KS) to get a second opinion. That was a nightmare. I'm not sure how the warranty works between the dealership and GM...but something isn't adding up...because it's as if the dealership does not give a damn about this concern. First of all they were very condescending. They say they can hear the noise but it takes a lot to make it happen. They had the balls to tell me that it only happens if I accelerate too fast. And the person that put this in the report didn't even do a ride along with me...in fact I never met him. The tech that originally did a ride along wasn't even involved...even though he knows the truth. Are you kidding me!!! They were complete assholes! The noise happens all the time at normal acceleration from a stop. I'm tempted to get an attorney to find out what my rights are in just making GM buy this vehicle back. I am extremely unhappy about this. This vehicle only has 1500 miles on it. So if anyone is interested...I will sell this vehicle for 44k. It's about what I have in it (a little more actually...since I've had the windows tinted and OEM mud flaps put on). It MSRP'd for $49425.00

I can't speak to the noise that anyone else that has posted on here is getting...but the speculation from "BringTheRain403" is about the most logical as far as the noise I am experiencing with my truck. Because the popping I'm getting seems to happen not only when I accelerate or de-accelerate...but I've noticed it sometimes as I go around a corner. Not only that...it seems like it's coming from the rear end differential. I will certainly mention that to them when I take it back to the dealership next week.

I've read through all the posts on this thread and it sounds like I should have posted my problem here instead of on the thread where I originally posted (even though it's on this website). Anyway, it sounds like I have the same problem as everyone here. So far I have 1400 miles on my new 2014 GMC Sierra and it sounds like the popping noise is getting louder. I took it to a GMC dealership and they could hear the noise but couldn't find it. I was basically told just to live with it for now...because they don't know much about these new trucks yet. I find that totally unacceptable...especially since it's not the only problem I'm having. The cab of the truck has rattles (coming from the passenger side) when driven over any semi rough road...it has a gawd-awful smell sometimes when the heater is turned on. However, the popping noise is the most concerning. When I accelerate it sometimes pops so loud you can feel the vibration up through the floor board...or sometimes when I d-accelerate you can feel it when it down shifts. I've opened a ticket with GM yesterday. We'll see how that goes. Either way, I'm becoming more and more dissatisfied with this vehicle and becoming sorry that I even bought it. It's embarrassing when people ride in it and every has to ask what the popping noise is. I'm about ready to get rid of it and I've only owned it for 1 month now. A vehicle that costs almost 50K should not be having issues. Perhaps it time to switch to Ford!