With its massive size and big V-8 engine, there's no surprise that the Sequoia isn't exactly fuel efficient.
If you're having issues over the Sequoia's gas mileage, GM's full-size SUVs, the Chevrolet Tahoe and GMC Sierra, do offer a hybrid option, and Mercedes-Benz’s GL Class can be ordered with a clean diesel.
But it's worth considering that the Sequoia can carry up to eight and tow up to 7,400 pounds. If you're using the Sequoia's full capabilities, then its official EPA rating of 13 mpg in the city and either 17 or 18 mpg on the highway might not be so horrible. Drive the Sequoia empty to work every day, though, and you might be the target of environmentalist scorn.