I have a 07 Chev 2500 Dmax with 35000 miles on it, when ever it gets below -20 here in Canada engine lite goes on get reduced power to 2000 RPM and no speed past 60 kmh. GM answer is allways to put winter front on and it works! I have tried to leave cover off air filter and plug the front intake since I really dont like the stock winter fronts, but still power loss. Anyone know where they have cool fronts for chevs?:)