have a z71 x cab sierra. 5.3. i pull a 23 foot toy hauler just about every other weekend. i'm looking for a little more umph out of her. she only has 70 thousand miles on her, and i just replaced the ORIGINAL tires about a month ago. this truck was garaged all the time, and when it was drivin, hardly ever, it was all freeway miles. has a average bolt on flowmaster that was on there when i got it. and thats it. after she gets a full tune up, i'm wondering what i can do to help pull that trailer a little easier? intake, programmer, cam, gears? i dont want to go crazy because i love how she drives as is, but more pulling power is a must. any help in this department would be appricated. thanks
jeff
jeff