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2009 GMC

C

Cman

Member
I have a 2009 GMC Sierra 1500 extended cab, 2 WHD
5.3 V8 engine, AT. Current milage: 4500
Since purchasing this truck I have a very definite viberation, called "Beam Shake" by GM, or suspension viberation, felt in the steering wheel, seat and floor. All tires have been replaced with Michelin LTX 2657017, with little or no improvement. Viberation is very pronounced from 40 MPH to end of range.
Has anyone else had this problem with either GMC or Silverado, if so how corrected.
I as well as the dealer are at a complete loss as to what to do next. All the obvious things has been done, front end alignment, balance, etc.
Anyone having a similar problem a post would be appreciated. Thank you..............
 
Bent rim? Bent axle? Bad brake rotor? Electrical- maybe a speed sensor or traction control sensor. You know that there are "lemon laws". I personally know 2 people who had issues with their vehicles right from the gitgo. Both vehicles were less than a year old and after the 4th trip to the dealer with no improvement they were replaced with brand new, equivilent vehicles. The first one took an attourney's letter to get things rolling but after that, there were no problems. And yes they were both the same brand but different dealers.
 
Would put money on an improperly welded or balanced drive shaft. Buddy had the same problem with a 2003 regular cab when it was new. Dealer tried everything except drive shaft. Buddy insisted dealer replace the drive shaft but he refused. Buddy took the drive shaft to a shop. It was welded so off center they had to make a new one. The dealer did finally pay the bill for it tho.
 
Don't know about this specific, but the lemon law is interesting. Wife's uncle used to be a service manager at Toyota City in Minneapolis MN. I think it was around 1987 or so, a Camry was brought in, and not fixed, so the lemon law was used to get the owner a new one. Wife's uncle bought the 'lemon', but could not take possession until Toyota had been able to look at it. I asked him years later about what had been found. I guess they had the whole car apart-every nut and bolt was on a bench-never could find anything wrong. They put it all back together, and it was perfect! Something must have needed assembling differently...! Greg
 
Hi Pete: I'd go with you and MN Scott or others that suggest mis-alignment or something bent.
I would suggest finding a shop that has a dino where the rear wheels drive a large drum which hooks to a dino to test horsepower from rear wheels. A small race car/engine builder would maybe have that. This would seperate the front wheels from the driven rear wheels and narrow the search. Too many things rotating with whole car/truck on highway whereas on dyno one could maybe see or feel where vibration is. Worth a try and a simple test, I would think. ag
 
a coworker of mine experienced that on a 07 3/4 ton he fought with gm for about 8 months finally they did something to the drive shaft i think they added a carrier bearing and a short piece of driveshaft icould find out exactly what they did if needed,
 
I bought a new 1966 GTO that vibrated from about 40 MPH on up; it was the drive shaft.

My father in law bought a new 1968 Dodge crew cab pickup which vibrated. It turned out the driveshaft was bent. A new drive shaft fixed that one.

If you have the drive shaft balanced, make sure they center on the u-joints themselves to balance it. We had a driveshaft balanced, but they centered on the driveshaft tube. Needless to say, it still was not in balance.
 
Drive shaft, doing an alignment to stop a vibration is proof they do not know what they are doing anyway.
 
(quoted from post at 14:45:39 01/24/10) Driveline shake will be most pronounced at 30, 60, & 90 MPH.
Click to expand...

Would you please explain why you state viberation will occur at 30 mph intervals?
In your opinion would different gear ratios in the differentials affect your 30 mph spread?
 
In addition to the things already mentioned,
Some really rare( but possible in a new veh.) things to check.
Loose nut on pinon yoke, loose flexplate or torque converter, loose trans/engine bolts/dowel pins.
 
Any aftermarket equipment ?? Things like running boards installed wrong......bolted to body and bolted directly to frame.....takes out dampening normally done by rubber body mounts and transfers normal driveline vibration directly into body.....seat.....steering.
 
viberation, felt in the steering wheel, seat and floor.
Click to expand...


Cman

Certainly inspect the drive line for pinion angle, drive-shaft joint phase & balance, & usually a vib in the seat and floor does indicate an out of balance condition somewhere in the rear but having the vib telescope through the steering wheel would indicate a problem forward of drive line.

What (if any) components has the dealer replaced (please be very specific).

Has the engine been checked for Ign. misfire, is the vib more pronounced on the drivers or passengers side, has the dealer realigned & or hung extra weight on the exhaust system, have the wheels been spun while on the vehicle, how about tire inflation=max, have you driven around with the vehicle loaded?

Chevcase asked about aftermarket equipment, have you installed anything that is not OEM like bug deflectors, cab visor, running boards, lift kits or ground effect packages?.. Anything?

Details man...



[size=7:b576ac2a4b]Scott[/size:b576ac2a4b]
 
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