Jeep 2013 Grand Cherokee - Owner Manual - Manual (Page 552)

ADDING FUEL
Fuel Filler Cap (Gas Cap)
The gas cap is located behind the locking fuel filler door,
on the driver’s side of the vehicle. If the gas cap is lost or
damaged, be sure the replacement cap is for use with this
vehicle.
1. Press the fuel filler door release switch (located under
the headlamp switch).
2. Open the fuel filler door, and remove the fuel filler
cap.
Fuel Filler Door Release Switch
550 STARTING AND OPERATING