I have noticed the last few times I have towed that coolant is leaking out the degas bottle at the cap. The dash temperature gauge hasn't changed and it doesn't seem to run wierd or anything. I don't smell fuel in the coolant so I don't think its a injector cup or anything like that.
Do I have a bad cap or thermostat? It only seems to be a problem when towing, never does it when unloaded.
My 2001 did the same thing . It turned out a injector cup on #3 cyl. was bad and was presuring up the coolant system which was causing coolant to go out the cap due to the excess pressure. Motor ran fine, no coolant in the oil.
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