2008 Jeep Commander Owner Manual - Page 355

STARTING AND OPERATING 355 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 − Do not attempt to tow a trailer while using a compact spare tire. − Proper tire inflation pressures are essential to the safe and satisfactory operation of your vehicle. Refer to the "Tires-General Information" section for proper tire inflation procedures. − Also, check the trailer tires for proper tire inflation pressures before trailer usage. − Check for signs of tire wear or visible tire damage before towing a trailer. Refer to the "Tires-General Information" section of this manual for the proper inspection procedure. − When replacing tires, refer to the "Tires-General Information" section of this manual for proper tire replacement procedures. Replacing tires with a higher load carrying capacity will not increase the vehicle's GVWR and GAWR limits. Towing Requirements - Trailer Brakes − Do not interconnect the hydraulic brake system or vacuum system of your vehicle with that of the trailer. This could cause inadequate braking and possible personal injury. − An electronically actuated trailer brake controller is required when towing a trailer with electronically 5