For some reason, there is a lot of air being sucked up by my truck. Not sure if its cause its cold or what, but it will continue to do it even after warm up period and city driving, although when i take it on the hiway it will loosen up and run normal and quieter. not sure why there is a difference because i warmed it up for 20 minutes yesterday and drove it for 30 minutes at roughly 30mph and it continued to run really loud. later in the day after work, i took it on the hiway and within 5 miles it was running normal. i've taken it to the dealer twice and they keep saying nothing is wrong, but its really loud and aggrivating cause im mostly city driving. i bought this 2010 ram 5.7 laramie used and its been doing it since i've had it, so i dont know they are suppose to do this or what. anybody know anything?