See also:

Instantaneous Economy and Active Fuel Managementâ„¢ Indicator
If the vehicle has this display, press the trip/fuel button until INST ECON V8 displays. This display shows the current fuel economy at a particular moment and will change frequently as driving condit ...

Vehicle Overview
Though gas mileage ratings for GM's full-size SUVs are impressive among their competitive set, they aren't likely to bring smiles to anyone at the pump; their combined ratings still linger in the ...

Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn the ignition to LOCK/OFF in each shift lever position. • The ignition should turn to LOCK/OFF only when the shift lever is in P (Park). †...