07 GMC Sierra Classic Vibration Problem

[christophersond]

I've sent in a couple of threads on my 07 GMC Sierra Classic, and the powertrain vibration between 55-65 MPH--especially while towing. It was a 2500HD, Crew Cab, 4WD, Duramax/Allison, with the long bed (2 drive shafts). After numerous complaints to the dealership, 2 letters to GM, and several phone calls later, they agreed to help me get out of that truck. I now have a 2009 GMC Sierra, Crew Cab, 4WD, Duramax/Allison, with a short bed, and it is absolutely loaded (well over $54K MSRP). I got the new Sierra for $18K, and my old truck. :D

[NutNbutGMC]

I've sent in a couple of threads on my 07 GMC Sierra Classic, and the powertrain vibration between 55-65 MPH--especially while towing. It was a 2500HD, Crew Cab, 4WD, Duramax/Allison, with the long bed (2 drive shafts). After numerous complaints to the dealership, 2 letters to GM, and several phone calls later, they agreed to help me get out of that truck. I now have a 2009 GMC Sierra, Crew Cab, 4WD, Duramax/Allison, with a short bed, and it is absolutely loaded (well over $54K MSRP). I got the new Sierra for $18K, and my old truck. :DYou got very lucky relative to the experience I had with the 2-piece shaft on a 2001 model. Congrats on the new machine and the good results. I'd have been hard pressed to give up the LBZ... :D

Thanks for the info....