2009 Jeep Grand Cherokee Owner Manual SRT8 - Page 337
2009 Jeep Grand Cherokee Manual
Page 337 highlights
STARTING AND OPERATING 335 Towing Requirements - Tires − Proper tire inflation pressures are essential to the safe and satisfactory operation of your vehicle. Refer to "Tires-General Information" 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 "Tires-General Information" for proper inspection procedure. − When replacing tires, refer to "Tires-General Information" 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 actuated brakes. When towing a trailer equipped with a hydraulic surge actuated brake system, an electronic brake controller is not required. − Trailer brakes are recommended for trailers over 1,000 lbs (454 kg) and required for trailers in excess of 2,000 lbs (907 kg). 5