2015 Colorado/Canyon Shakes Vibrates

[SuitUpAdventures]

I have a new 2015 Chevy Colorado Crew Cab Z71 2x4 and i have had it for about a month now after waiting 2 months ordering it. I am hoping someone here can help or possibly provide some insight beyond what I have already been able to figure out.

 

I am getting a pretty strong left to right shake on the freeway that starts almost exactly at 79/80 mph and doesn't go away as i go up. I live in Southern California so 80mph is a pretty standard speed on the freeways here. If no one is in the passenger seat you can see it moving back and forth. I don't feel it at any lower speeds.

 

I have had it to the dealership 3 times so far. 1st time they balanced the tires and it didn't fix it. 2nd time i took the tech on a ride and he said he definitely felt the shake and thinks it is most likely the drive shaft. So i take it the 3rd time and they had it for a week only to find out they only balanced the tires again. They claim to have done the vibration test and couldn't find anything and obviously didn't listen to the tech that was in the car with me. They have since claimed there is no issue and I am basically making it up/ it is a normal shake. Personally, i don't think they even tested it at 80mph because they keep trying to say that since it is over the speed limit they can't test it. I would love to hear them say that to someone who bought the Corvette and had this complaint.

 

I am not an idiot when it comes to cars, i have worked on my own cars for a long time but this is a brand new car that I feel the dealership and Chevrolet/GM should be doing a far better job of insuring it is issue free and SAFE. I do have another scheduled appointment with the dealer set up through Chevy/GM customer service where i will show them the video i recorded with my GoPro that proves at 80 and over its shakes like a massage chair so bad you can't even see the cars/lanes through the window.

 

I love the truck and really want to get this issue fixed but if Chevy keeps denying it and wont stand behind their products I will have to get the lawyers involved and lemon law. If the truck would have came with a disclaimer that you can't drive over the speed limit without it shaking I wouldn't have bought it.

 

I would love to hear if anyone else is having the same issue or any professional mechanics that might have an idea of what it could be.

 

Thanks

[MA-Silverado]

Couple questions for vibrating GM’s,

 

Has anyone tried to put their truck in neutral while on the highway at the vibrating speed? Does it continue to vibrate with the engine at idle while coasting?

Does everyone with this vibration issue have a secure lock nut on all four wheels?

[SuitUpAdventures]

Update:

 

Have been driving the truck for about 2 weeks now since i got it back from its 3rd sleepover with the dealer where they replaced a FRONT tire for my cabin shakes. It has definitely been much better. There is still some shake but at the moment seems to be only for a MPH or two, maybe 80, 81 then its better. I will keep paying attention and update to inform if shakes are worse/better/same.

[MA-Silverado]

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.

[MA-Silverado]

Update, 2015 1500 Silverado.

 

Had the truck at the dealers yesterday afternoon and they did not fix the issue but here is what they did. Re-balanced all four tires, fixed weight issue on a few and they wanted to check the rims but their machine was out of service so I have to go back for another service call for that. Dealer could not guarantee that this would fix the issue because they could not drive the truck due to rain. They advised to call back if the issue continued. After the service call it seemed to be worse so I headed to my father in-law's to try his rims and tires from his GMC Sierra. His tires (Goodyear) and rims (steel) were the same size but different brand with almost 14k miles on them. After placing his tires on my truck I really noticed the vibration/shaking. So it seems, the more miles on a tire and lower PSI I notice the issue, the newer the tire with more PSI the less I notice the issue. I may be wrong in thinking it's the tires that's causing the issue. If it was the tires the vibration should have stopped with his.

 

Also, my father in-law drove his truck with my rims and tires and felt no vibration or shaking, smooth ride!

 

I will be calling the dealer back today to schedule another service call. I’ll update the post from my next visit.

[tutakt]

While I hesitate to call it a shake, or vibration, I do have a drivability issue wiht my 2015 Canyon Crew Cab. It feels like I am driving through heavy cross winds where the vehicle is being pushed sideways. It is apperant only when I am driving on pavement that is grooved and never felt on asphalt or concrete that is not grooved. The dealer has rotated the tires twice and checked the alignment but the issue persists. I have contacted Customer Service and was told that the vehicle seems to be performing as designed. {Quite a statement since many GM ignition switches were performing as designed.) The GM Field Service Representative has refused to drive the truck.

 

My theory is that the rear axle is not properly aligned. The tires want to follow the grooves in the pavement as they should. However if the axle is not aligned it tens to pull the rear of the vehicle to the side. When it reaches a certain point or the weight comes of the rear axle the vehicle jumps back to what should be it's normal track.

 

Does anyone else have this issue on grooved pavement?

[SuitUpAdventures]

Sorry to hear that MA - Silverado. I was actually told the same thing by the GM customer service. She said it may just be how the truck is supposed to be. I couldn't believe it because she even said that after i had told her the the Service Manager admitted there was something wrong with it. Mine is supposed to go in next week. They needed a new vibration tool. Apparently there aren't real mechanics anymore.. My buddy who is a master Toyota mechanic but is not bias to them, he still loves his american made, is in aw of how Chevrolet is handling all these issues.

 

Hopefully you can get it resolved quickly. I would love it if mine was fixed by something as easy as a software issue but its hard to think of how software could be causing this shake. Then again its amazing what the computers control in these things these days.

 

Ill keep everyone posted with how mine ends up next week. Fingers crossed!

[pm26]

23 degrees out of spec

 

23 degrees out of spec!!

 

Thats crazy.

I would like to know what "23 degrees out of spec" means, because it does not make any sense.

[MA-Silverado]

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.

[Pinnacle]

Update,

 

Truck has been at the dealership today and they found two problems. The right rear tire is bad and driveshaft is 23 degrees out of spec. They have ordered a replacement tire and drive shaft. Hopefully parts will arrive Monday/Tuesday depending on shipping because of the holiday weekend. I am not holding my breath but I sure hope this fixes the issue. Will update once parts are replaced, have a great holiday!!!

 

@trem99 - You may be onto something.

23 degrees out of spec

 

23 degrees out of spec!!

 

Thats crazy.

[PMurray]

My vibrating Silverado was fixed and continues vibe-free. They found the ring gear in the rear differential was badly out of specs and replaced the entire axle and diff. Worth a look.

 

Good luck!

[trem99]

Thanks for the updates everyone.

 

I've spent some time under the truck the past couple days - my driveshaft seems to have several large weights on both ends. I measured runout of the driveshaft and it was 0.035" nearest the transmission, so it seems they correct the runout with weights to get everything back in balance. Makes sense I guess. The transmission mount/dampener there seems really soft (I could shake the driveshaft/trans with my hand quite noticeably) so I can see how a slight balance issue might shake at high speeds.

 

For fun, I strapped a couple of washers to the driveshaft to see if I could affect the shake - well sure enough it seems to really have calmed down to a point I barely notice it, at least in my quick test drive this evening.

 

I wont have a chance to try anything else over the next week or so as I am heading out of town, but maybe this info helps.

[SuitUpAdventures]

Thanks for the info. I mentioned it to the dealer and they are going to look into it after I took the higher ups for a ride to feel the shake.