Wondering what kinda gas mileage you get? I just got rid of my daily driver (05 Scion XB) because I need a truck. I'm just wondering what to expect. I drive 80% highway.

Thanks.

05 tahoe (same drive train as the pick ups)5.3L 4le60 4:11 gears 18.5 hiway ,combined 17 mpg, I drive 70 miles a day all hiway,even at 18.5 its starting to hurt and I already have 30,000 on it,so thinking about a little 06 malibu 30mpg hiway,don't know what to do...Happy Motoring