Alamo was just fine but they didn't have any of the Equinox SUVs (they have a really efficient 3.4L engine). Instead I got "upgraded" to a Trailblazer which has a more fuelish 4.2L. The difference is one of 25-26mpg on the highway versus 20 or so mpg. I didn't do that much driving but bought around 17 gallons of gas (some of this was no doubt because the tank was just at "F" when I picked it up but probably 2-3 gallons down).
The Trailblazer was in great shape--it had 10,000 miles and looked and smelled new. It had a remote control entry too which is great.
Portie