2012 Jeep Grand Cherokee Owner Manual SRT - Page 490

488 STARTING AND OPERATING WARNING! (Continued) • Safety chains must always be used between your vehicle and trailer. Always connect the chains to the hook retainers of the vehicle hitch. Cross the chains under the trailer tongue and allow enough slack for turning corners. • Vehicles with trailers should not be parked on a grade. When parking, apply the parking brake on the tow vehicle. Put the tow vehicle transmission in PARK. Always, block or ؆chock؆ the trailer wheels. • GCWR must not be exceeded. • Total weight must be distributed between the tow vehicle and the trailer such that the following four ratings are not exceeded: 1. GVWR 2. GTW (Continued) WARNING! (Continued) 3. GAWR 4. Tongue weight rating for the trailer hitch utilized (This requirement may limit the ability to always achieve the 10% to 15% range of tongue weight as a percentage of total trailer weight). Towing Requirements - Tires − Proper tire inflation pressures are essential to the safe and satisfactory operation of your vehicle. Refer to "Tires - General Information" in "Starting and Operating" for proper tire inflation procedures. − Check the trailer tires for proper tire inflation pressures before trailer usage.