Ryan11405

I'm a long time lurker.. first GM was a 2004 GMC Sierra CC Z71 4wd, bought it in 2005 with 27k miles, traded in Feb. 2015 with 210k on the clock. Family had two 2000 vehicles, Chevy silverado and GMC Yukon XL that lasted 265k+. Never seen a vibration at idle like the 2014 Chevy Silverado CC 5.3 2LT Z71 2wd I just bought. it idles in drive just under 500 rpm, has a big vibration in drive at idle with brake applied. First noticed it on the test drive then again in town after a long highway drive. Got the wife to sit in the drivers seat and shift it around, and I noticed that there was no vibration at all until she shifted into drive. When she did, the motor shifted/flexed about 2cm clockwise (to the right side of the truck) and the truck was vibrating bad. No shift/flex in other gears. Wonder if the issue is just spongy motor mounts? It drives fine, although at 76-78 mph it vibrates like crazy (off and on) but I think that problem is suspension.

i have the same problem. i have no clue as to a solution. i guess when it breaks, it breaks.