mkirsch wrote:
Tuners only affect gas engines at WOT. Unless you run around with the gas pedal mashed to the floor, they won't help.
Gearing, smaller tires, do not add power. They allow the engine to spin faster at a given speed, with the caveat that you're stuck with it ALL THE TIME, even not towing.
The most cost effective solution is, if the truck is doing the job now, and you don't want to trade it, to learn to be happy with what you have.
One is only “stuck” with the look and reduced load capacity of smaller (17” wheels are the only viable option for significantly smaller tire diameter in this case) wheels.
Truck has enough rpm’s and gears to run bobtail highway speeds on small tires at sane rpm’s no problem. Even if they already have 4.30s.
Plus OE 17” steelies takeoffs are dirt cheap, with tires. Good option to throw on for towing if it suits the OP. It fits the bill of “a little more power” for the least amount of money and issues.