Truck has a shake between 45-75 mph. depends on rpms and tire pressure. does not matter if it is highway or city. most notable between 65-72mph. have had it to the dealer 3 times. 1st time, they said it was the tires as there were new and overinflated. told to drive it a few hundred miles. 2nd time at dealer, the road forced balanced and replaced a tire. no fix. 3rd time, a service tech actually rode with me. let the vibrations, noted them as well. after we arrived back to the dealer, waited 20 minutes until the service tech came back. tech stated that the truck has stiff springs and performed as expected. the tech looked like he didn't even believe it. i have heard all three of these scenarios for "fixes" from other titan owners. it must be the line they sell us. also, why do not all titans have the shake? disappointing that nissan won't acknowledge the issue or attempt to really fix it. issue has been since day one of ownership, july 2019.