JDWLT

Took my 2011 GMC Sierra Duramax into dealer for warranty work, "Poor Exhaust Fluid". Dealer loaned me a 2015 Chevy 1500 to use till my truck was fixed. Drove the loaner on the freeway at 65 MPH. Could feel the vibration at 65 and above. Mentioned it to the service writer when I took the loaner back. He said "Keep it quite as we are a where of some of these trucks vibrating". I also own a 2014 GMC Sierra 1500 All Terrain that DOES NOT VIBRATE. Lucky so far I guess. Happy New Year!!