Factory Fuel Mileage Monitor

[immortalic]

So I just bought a 2008 ECSB Silverado with the 5.3l, 4wd LT. Guy I work with has a new sierra, and tells me that some of the trucks have a factory fuel mileage monitor that goes in the bezel where the headlight and dimmer switches are. I haven't seen anything about it, can't find anything about it, but he tells me I can buy one, and it's plug and play and will work. Does anyone have any ideas about this? I would appreicate any input, thanks.

[immortalic]

anybody have any information on this?

[94tbiblazer]

anybody have any information on this?

there is a driver information switch panel you can buy at the dealership its listed as an upgrade for the 2007 and up models, when i bought mine it cost aroung 80$