ssch00

21' Elevation Crew Cab, freshly shined up. I was hesitant about the 2.7t at first, my local dealer couldn't get any other engine in, 500 miles and it's been a good runner so far.

Wanted the throw my experience in here. I just got a brand new 2021 Sierra last week and pretty much right off the lot I was getting the rear end clunking. Asked the service center, he took me out into the lot and told me they all do that, he grabbed the rear end of a few trucks, shook them back and forth and they all clunked. It was driving me crazy so I found this thread. I tightened my u-bolts to 60ft/lb(they were maybe 45ft/lb), put the spring-things in the rear of the springs and threw some grease between the pads in the front of the leaves(even with the frame jacked up I was having a hard time getting the spring-thing to slide into there). And success! The clunking is almost completely gone. I can grab the rear tire, shake it pretty violently and all you hear is the little bit of axle play in the diff.