Summer Operation

The engine cooling system in air-conditioned vehicles must be protected with a high-quality antifreeze coolant to provide proper corrosion protection and to protect against engine overheating. A solution of 50% ethylene glycol antifreeze coolant and 50% water is recommended.

Refer to “Maintenance Procedures” in “Maintaining Your Vehicle” for proper coolant selection.

    See also:

    Vehicles Equipped with Remote Start
    On models that are equipped with remote start, the driver’s heated seat and heated steering wheel can be programmed to come on during a remote start. Refer to “Remote Starting System — If ...

    Go-Anywhere 4x4 Systems
    The 2011 Jeep Grand Cherokee offers three 4x4 systems (Quadra-Trac I®, Quadra-Trac II® and Quadra-Drive® II). Quadra Trac I delivers full-time four-wheel drive without any switches or levers ...

    Traction Downhill
    Shift the transmission into a low gear and the transfer case to 4WD LOW range. Let the vehicle go slowly down the hill with all four wheels turning against engine compression drag. This will per ...