Some say the buffeting on earlier models is more common on long wb with sunroof. Push button start is also part of luxury package on LT, but could make stealing truck easier by swapping ecu and not needing keys. I believe the 15-17 non LTZ have the dim led drls. After a fully loaded Avalanche, I opted for an LT to avoid the expensive suspension components and get cushy 18" tires. Get the tow package if you need to tow over 6k. NAV is no longer needed with AA or carplay, and sucks compared to either. The less automation, the less to fail, so consider that when getting options you do not need. I have been really happy with my 18 non lux LT burb, and added a few essentials like fogs, heated wheel, rear center jump seat, hellwig sway bars, corsa, ect...
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