See also:

Lumbar Adjustment
Power Lumbar Eight-Way Power Seat Shown, Four-Way Similar A. Lumbar Switch If available, press and hold the front or rear of the switch (A) to increase or decrease lumbar support. Release the s ...

Exterior
There's hybrid badging on the cab's rear window, ahead of the side mirrors and on the tailgate, but otherwise the hybrid version looks similar to the gas-powered version. ...

Fuel
For diesel engine vehicles, see “Fuel for Diesel Engines” in the Duramax Diesel Supplement. For Vehicles with gasoline engines, please read this. ...