I just traded my 01 6 spd man 2500 cid quad cab for a 03 automatic crew cab slt 2500 cid. What chip or programmer would be a good match for this truck? I pull a 33ft Travel Trailer approx 7000lbs. The truck came with a trans oil cooler. Iwould like to leave drivetrain stock but would like more power towing without overstressing the trans.