2015 Silverado LT Vibration/Shaking

kolar228 · July 13, 2015

Howdy, My 2015 z71 ltz has a vibration at about 42-45 mph, Had it into the dealership, they had it for 4 days and said they had the driveshaft rebalanced. The vibration is reduced but still their. On inspection when I got home It looked like a weight was welded on by the diff. But NO signs of the driveshaft being removed ?. Now it is back with a collasped lifter. waht else can go wrong.

Just a little on me I forced into retirement from GM in 2008. From GM Truck & Bus in Pontiac, Mich. Now known as the north american truck plant.

I have done about every job their but mostly in repair and inspection. Roll test Inspector,Road test inspector, Heavy repair mechanic in Heavy and light trucks and Buses. It seems that the service tech DON'T listen to the customer.

I will keep you posted.

ghgmi · July 13, 2015

[...] because the roads are so bad out here in California because they are made out of concrete [...]

Almost blew coffee out my nose on that one. CA has much better and smoother roads than anywhere I've lived. Try the frost-heave latitudes.

That said, the tires currently on my car (Goodyear) sure are loud on concrete.

ghgmi · July 13, 2015

driveshaft is 23 degrees out of spec

What does that mean?

medicconnor · July 13, 2015

There is 300 pages on this topic in another thread what you will find is there isn't a fix, and dealing with GM is not easy.

Jesse Davidson · July 14, 2015

There is 300 pages on this topic in another thread what you will find is there isn't a fix, and dealing with GM is not easy.

http://www.gm-trucks.com/forums/topic/153186-shake-or-vibration-issues/page-336

Conussd · July 15, 2015

So got my truck back yesterday. Diagnosis: there weren't any wheel weights on any of the tires. Guess they forgot to balance the tires at the factory. So for now, vibration and shaking is unnoticeable. Truck just turned a year old with less than 8k miles. Hopefully no other problems develop. *fingers crossed*

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tnchevy · July 15, 2015

You drove the truck for a year without any weights on the rims?!?! No wonder you had shaking/vibration problems.

MA-Silverado · July 15, 2015

Update,

GM tech has been on site working on the truck for the past two and half days and cannot find the problem (truck has been at the dealers since July 1st). Issue has been escalated to the next tier support and another twelve to twenty four hours of waiting. I get the excuse of “we have to follow a process” but no one can tell me how long this process can last, just another 24hours of waiting and then another and another and so on. I’ll update the post once I get more info.

Jesse Davidson · July 16, 2015

So got my truck back yesterday. Diagnosis: there weren't any wheel weights on any of the tires. Guess they forgot to balance the tires at the factory. So for now, vibration and shaking is unnoticeable. Truck just turned a year old with less than 8k miles. Hopefully no other problems develop. *fingers crossed*

Sent from my iPad using Tapatalk

how is it now that its a day later?

Update,

GM tech has been on site working on the truck for the past two and half days and cannot find the problem (truck has been at the dealers since July 1st). Issue has been escalated to the next tier support and another twelve to twenty four hours of waiting. I get the excuse of “we have to follow a process” but no one can tell me how long this process can last, just another 24hours of waiting and then another and another and so on. I’ll update the post once I get more info.

good luck! I'm looking forward to any results you get, I do love my truck... other than the issues of course, I would love to have them fixed

medicconnor · July 16, 2015

I have a engineer coming to look at mine. Ill let you know if there is any solution.

Jesse Davidson · July 17, 2015

I have a engineer coming to look at mine. Ill let you know if there is any solution.

nice to hear, we are all looking forward to hearing what happens

14silverado4.3 · July 17, 2015

Medic, has anyone hooked up a vibration analyzer to the vehicle?

MA-Silverado · July 19, 2015

Update,

After escalation, GM and dealership tech found the following anomaly. Dealership pulled in four Silverado’s from the lot and compared them to mine. During inspection they noticed the exhaust system was not the same as the other four trucks. For some reason and no one can explain to me why the exhaust was run from the flex pipe in a different direction than the rest. They thought the vibration maybe coming from the exhaust and explained they may have to replace the entire system from end to end. They did a test (not sure exactly what they did) with the exhaust and were still not able to identify the issue but are not ruling out the exhaust system just yet. Issue has been escalated again and a GM engineer from Michigan will be coming to the dealership next week. I believe this is the final approach of a resolution before we start looking at a buy back or swap of some sort. I’ll update the post once I hear from the dealership.

Newell33 · July 19, 2015

I'm going to go out on a limb and say that that's not going to solve the issue...

Bdkfl · July 19, 2015

Update,

After escalation, GM and dealership tech found the following anomaly. Dealership pulled in four Silverados from the lot and compared them to mine. During inspection they noticed the exhaust system was not the same as the other four trucks. For some reason and no one can explain to me why the exhaust was run from the flex pipe in a different direction than the rest. They thought the vibration maybe coming from the exhaust and explained they may have to replace the entire system from end to end. They did a test (not sure exactly what they did) with the exhaust and were still not able to identify the issue but are not ruling out the exhaust system just yet. Issue has been escalated again and a GM engineer from Michigan will be coming to the dealership next week. I believe this is the final approach of a resolution before we start looking at a buy back or swap of some sort. Ill update the post once I hear from the dealership.

Unless you sent them the final repair attempt they'll keep working on it. We just had ours with the engineers for a whopping two days. They replaced the two front tires that failed the road force. We don't know why that's all they did, I looked my service advisor square in the eye and told him it wouldn't be fixed. And guess what, it wasn't even a little bit better. They already road forced and changed out four tires before the rebuilt the differential and changed the shaft. We have to call Monday to find out the next step but seeing as they spent so little time with out truck we think they ruled it as a lost cause, so hopefully the buy back talks will go smoothly!