By focusing only on the truck, the Tahoe is from the same platform as the Silverado and Avalanche, so they have basically the same Powertrain, suspension and chassis, as well as most of the interior stuff.
Depending on what features/options the one you are buying has, it is a good truck. It is reliable and safe.
GM best vehicles are its trucks like the Tahoe.
Besides the gas its maintenance is regular.
Like with any vehicle if you are not careful while driving you can seriously injure/kill anyone and negatively change someone's life including yourslef and your occupants.
Please be careful and imagine all the damage that can be caused with any vehicle if you are not thinking in the consequences of the decisions made in some milliseconds while you are driving.
If you like video games and destroy other vehicles while playing that kind sh@t can happen in real life, I mean the damage to others and including your truck and all that is inside it.