I also call it a truck. I agree that it is technically an SUV but it is based off of a truck so that got my vote.
it isn't a truck... it has no bed.
it isn't a car... it is based on a truck chassis and driveline and vin'd and registered as a truck
it isn;t an SUV... it isn't sporty, and with the 3rd row, full carpet, etc. it isn't very utility either.
I just call it "the **"
though I call it generically 'car' more than I do truck.
truck are designed principally for moving objects,
while cars are designed principally for moving people.
Here is a follow-up question... if the Tahoe is in your mind a truck, what is Obamas new Cadillac DTS Presidential limousine?
It LOOKS like a car, but is based on a truck chassis and drivetrain, not a stretched car chassis.