Shake or Vibration Issues

silverado990 · October 23, 2014

click on PDF archives for September 2014 on left

mikeinmobileal · October 23, 2014

Thanks for the link silverado990, I guess all of us with the vibration should send a copy of the Vibration Diagnosis article on page 4 of this pdf to the service managers who said our vibrators are normal and cant be fixed.

Here is a direct link to the pdf. http://sandyblogs.com/techlink/wp-content/uploads/2014/09/Sept-Techlink-2014-F.pdf

mikeinmobileal · October 23, 2014

So how do you convince a service manager to look at something like the rear diff when they insist its just a normal characteristic of this truck.

You cant. Thats why you keep asking your dealer or GM to fix it until you get the required number of repair attempts, or they refuse to try again, then you file with BBB Autoline for arbitration if its required in your state prior to filing lemon law. Then you follow the process, jump through the hoops, document EVERYTHING, and you will probably end up in court filing for lemon law unless GM offers you a settlement before you get to that point.

Its aggravating, discouraging, expensive, time consuming, and it will make you use words that you havent used in years.

GM hopes that you will get tiired of it and give up. A lot of people do.

Read my signature, and good luck. Keep us up to date.

keakar · October 23, 2014

How is it that I'm lucky? How do I get out of this? By dying?

haven't you been reading this thread?

file with BBB go through the process then if still unresolved get a lemon law attourney and file in civil court

if you don't do these things you will never be offered a buyback, GM just stalls you until you have too many miles on the truck to file lemon law

2strokesmoke · October 23, 2014

Just to bring people up to speed my truck (ram as my Sierra was bought back) is at autobody shop for a paint defect and they rented a vehicle for me.

2015 suburban guess what same engine as my truck, 5.3L and 6speed tranny and it vibrates and shudders at 40mph to 60mph and the radio has issues with signal loss too. Same sh*t my bought back truck did.

WTF man, GM you are destroying your self by not fixing these issues!

This is a tranny issue with out a doubt in my humble 25years of fixing / building vehicles as a tech.

What is disturbing is they are still running this company like the mob would. They are only going to help you if and when you act on your rights! Use your BBB, use your Lemon Laws, use your Lawyers to get them to act.

mikegmi2 · October 23, 2014

Wish I would have seen this thread before buying my new truck.

Bought last week, 2014 LT All-Star 4x4 with 5.3L. First day driving it home in highway, felt vibrations in gas pedal around 65-70mph.

After driving more, I can better characterize each vibration:

1. There is a constant low frequency rumble/vibration constant at speeds around 50mph. It sometimes gets worse if you are traveling at faster speeds, and then take your foot off the gas and let the truck slow down to 50...vibrations feel stronger when doing this.

2. Pulsing vibration, like going over tiny rumble strips, between 65-75mph. I feel this mainly in the gas pedal, and a little in the steering wheel. The gas pedal vibrates like its some foot massager or something, very annoying. It is like 1 second of higher frequency vibrations, 1 second off...and continues as long as I am moving between these speeds.

3. More serious side-to-side vibration once I get up to 82-85mph. Shakes the center console/cup holder area.

So far I took the truck in at 200 miles, they told me to drive it until I get to 500 miles, then they will try some things on the tires, balancing, etc.

Is there any advice you guys can provide for me, just realizing what I got myself into?

Do I have to go through the multiple dealership service trips (how many exactly before filing with BBB?), and play things out as I have read others had to go through...is this the best course of action? Thanks!

mikegmi2 · October 23, 2014

Also, wanted to post photos of my brand new...rusty...engine. I have had the truck for a week. I took these today, while filling up at the gas station.

Edited October 23, 2014 by mikegmi2

00Silverado4x4 · October 23, 2014

Considering the exhaust manifold is one of the hottest parts of the engine and it's made out of steel that is to be expected to a degree (no pun intended). However, being a week old that looks excessive to me. I'm pretty sure mine didn't look like that at a week old. I'd take it back and see what the dealer can do for you there.

2strokesmoke · October 23, 2014

If I were you, insist that they start to sort out your vibrations now! This is a new truck you bought, you expect nothing less then a vehicle that drives proper without shaking and vibrations.

The more mileage you rack up might cause you more greif, also start a log book when where who you spoke to about your concerns.

Keep all service records, each time you leave after an attempt to fix your truck demand a printed work order of repairs or items worked on.

Good luck, you will need it too.

2strokesmoke · October 23, 2014

Those manifolds not normal amount of rust on there, you should check your frame and suspension very closely you may be surprised what you may find.

Take pictures and keep dates in your log book as you attempt to sort out these concerns.

Just saying from a person who went through a buy back and left the GM truck behind me.

mafd2 · October 23, 2014

Considering the exhaust manifold is one of the hottest parts of the engine and it's made out of steel that is to be expected to a degree (no pun intended). However, being a week old that looks excessive to me. I'm pretty sure mine didn't look like that at a week old. I'd take it back and see what the dealer can do for you there.

I know this is off topic from the thread but actually the manifolds are made of cast iron also known as grey iron. Prone to rusting. I've been having my truck about 3 months and has rust on them but not quite as much as shown. Common though.

Edited October 23, 2014 by mafd2

keakar · October 23, 2014

I know this is off topic from the thread but actually the manifolds are made of cast iron also known as grey iron. Prone to rusting. I've been having my truck about 3 months and has rust on them but not quite as much as shown. Common though.

I have to agree that's excessive, that's more then just surface rust you would expect, that's pitting and deep rusting from within there. I can see this causing issues around year 5 or 6 even if it continues like that.

most likely a batch of inferior metal was used when casting it

Edited October 23, 2014 by keakar

00Silverado4x4 · October 23, 2014

I know this is off topic from the thread but actually the manifolds are made of cast iron also known as grey iron. Prone to rusting. I've been having my truck about 3 months and has rust on them but not quite as much as shown. Common though.

There you go, cast iron...knew I had it wrong but the brain wasn't coming up with the right words...thanks.

pm26 · October 23, 2014

Cast iron or not, it can be painted to prevent rusting. Many engine blocks are made from cast iron, but they are painted afterwards so they look good for years. Some barbecue grills are also made of cast iron and they are painted too. I wonder who would buy a brand new rusty barbecue grill.

I know that many car and truck manufacturers do not paint cast iron exhaust manifolds because they are hidden inside the engine compartment. This does not mean they cannot be painted. It is simply cheaper not to paint them, especially because they would have to be painted with high temperature resistant paint . Boat water cooled cast iron exhaust manifolds are sold properly painted and they too are hidden from view until you raise the engine hatch.

Surface rust does not harm a cast iron part of substantial thickness, it only looks ugly.

Edited October 23, 2014 by pm26

BluByU14 · October 23, 2014

GM offered my buy back on Monday and I just put an order in on a 2015 GMC Sierra 6.2L 8-Speed today. They offered me MSRP for MSRP since only had 2000 miles on my truck and had the truck to the dealer 3 times since about 250 miles for the vibrations. I have to give a lot of credit to my dealership, they were advocates for me from the beginning. They told me that they wanted to make it right and keep me as a customer for life. I am just praying that there are no issues with this new 2015 .

The salesman who assisted me with the buyback did tell me that GM is very aware of the issues with these trucks and wouldn't let this bleed into a new model year (so he says). I asked if the GM would offer me all my money back, if I wanted to switch brands. He said that if I wanted to go that route, I would have to take a few thousand dollar hit vs. getting into another Sierra. So given that senario, I feel like I have nothing to lose at this point and will take the gamble on a 2015. If this 2015 vibrates....I will either switch brands or go into a used 11, 12, or 13 Sierra/Yukon.

Will keep everyone posted once the new rig arrives (8 weeks). Dealer said I could drive for a couple hundred miles before I signed any paperwork. Again I have to get a lot of kudos to my dealer for going to bat for me with GM and making things right for their customers.

Edited October 23, 2014 by BluByU14