For Dallas car rental at IAH, the airport is serviced by the major rental companies from a
single, central location at the new Consolidated Rental Car Facility which opened in August, 2003.
The choices include the following companies (links open in a new window):
When you are searching for rates and looking at types of vehicles, you will often see a make and model listed and then the notification that it is an example of the vehicle size... often you'll see the phrase "or similar". this means that while you can reserve a size category, the location does not guarantee a specific make and model. This option may be available with specialty or exotic cars, but rarely with regular car categories.
Alamo and National currently advertise the option to choose your own vehicle, so I checked availability for that option specifically for a Dallas car rental.
They offer the ability to choose your own vehicle through their Check In Now program.. where you do your reservation and rental agreement online in advance of the rental.
This option is available at participating locations. I checked, and it is available for rental cars at IAH. You can get more information on the Check In Now program atAlamo.com -- check in link is located in the blue tab marked Reservations at the top of the page.
The option to pick your own vehicle is part of their Emerald Club. If the Emerald Club Aisle is available at the location you're looking to rent from (it is available for National rental car at IAH) you can bypass the counter and choose any car on this exclusive section of the lot when you reserve a midsize car. (no other size vehicle is applicable). You can get more information on their website at http://www.nationalcar.com
Auto Rental Companies - Info on this Site
Car Rental Phone Numbers