Discussion Starter · #1 ·
I just bought a 2004 Chevrolet 2500HD with 45,000 miles on it. It has an aftermarket exhuast without a cat, K&N air filter, and a predator programmer set on 65 HP. My question is this...I've heard and read that you should not tow with a programmer because it will shorten the life of you engine & tranny, and that a tuner is really just for MPG's and blowing smoke all over the rice burners! Is this true? Also will it cause any problems to the motor and tranny if I set the programmer back to stock, but leave the exhuast, and air filter?