2005 gmc envoy_sle
i'm new here and i thougt i'd make an intro by telling everyone what i tow, and if i should get any aftermarket parts. I tow a 4600lb camper (dry weight) loaded with food, clothes and so on it probally pushes up around 4800lb (total guess) and i tow this about twice a year for a long trip (5 hours usually) on the highway and this past summer up and down through the moutains (nearly stalling at the top of a hill) We make maybe 1 other trip empty for servicing. Also we got a boat this past summer and it weighs about 2300lbs and i believe thats dry weight. we only towed this twice last summer, but will be towing this more often maybe 1-7 times monthly from may to september, with all this towing should i have any aftermarket things like a trans cooler or anything?