Trailer towing with the 6.4L or 6.2L Supercharged engine is not recommended.
Other information:
The engine block heater warms the engine, and permits quicker starts in cold
weather. Connect the cord to a standard 110-115 Volt AC electrical outlet with a
grounded, three-wire extension cord.
The engine block heater must be plugged in at least one hour to have an adequate
warming effect on the engine...
Tires
Examine tires for excessive tread wear and uneven wear patterns. Check for stones,
nails, glass, or other objects lodged in the tread or sidewall. Inspect the tread
for cuts and cracks. Inspect sidewalls for cuts, cracks, and bulges. Check the lug
nuts/bolt torque for tightness...