2018 3500hd dead on takeoff

Reed Hodges · August 17, 2019

Ok guys, I have a 2018 Chevrolet 3500 hd. I bought November 2017. I never have liked the way it was sluggish and the shift points. I installed a pedal commander 8 months ago. It was awesome. Last week I got check engine light with code saying throttle position sensor. I removed throttle commander and everything is fine on truck now. I installed aftermarket 20 inch wheel and tires so now the sluggish problem is even worse. Transmission hits 4 gears before 28 mph and if you try to take off from there the truck is dead. I love the truck, but hate this problem. Any suggestions???? Does anyone else struggle with this problem?

BO TIE 1 · August 17, 2019

Get a tune.

Reed Hodges · August 17, 2019

What do y'all recommend? I had a powerstroke with edge tune, but not sure on a gas. Any help appreciate.

Reed Hodges · August 17, 2019

It's like I have to stand on the gas pedal and I'm not a speed demon!

newdude · August 17, 2019

What size tire on the 20" wheels?

Donstar · August 17, 2019

51 minutes ago, Reed Hodges said:

It's like I have to stand on the gas pedal and I'm not a speed demon!

Welcome to this forum! You own a one ton pickup and it will be powered appropriately for transporting significant loads. It was not designed for speed and agility. I appreciate that you're not a speed demon so my interpretation based on your description is your truck has mechanical problems. Take advantage of your powertrain warranty and get it repaired. I would not be paying for pedal commanders and tunes on a very new1 ton truck.