Power limiter/reducer?

Mighty HD · June 12, 2004

Is there some sort of power limiter/reducer on the 03 2500's 6.0? At times the truck feels like a bullet, and others it feels normal.

Or I must be going nuts?

GMCTech · June 13, 2004

There is a rev limitaion, and a speed limitation programmed in to the computer.

I think the rev limiter is about 5500 RPM, so under normal driving you should never reach it.

The speed limiter is set at 105mph I believe here in th States.

Hope this helps.

Mighty HD · June 13, 2004

Other than that there is nothing else? I swore I saw somewhere that there was a power assist or something when I was searching?

Mort · June 13, 2004

It could be torque management that you are referring to. When you start out and between shifts if the computer senses a lot of torque being applied to the drivetrain it will pull some timing to ease the strain on the drivetrain and transmission and maybe reduce the line pressure in the tranny. This causes the truck to feel really flat and unresponsive and greatly reduces your fun factor. I am not sure how much torque management there is in an 03 2500 6.0 but probably not as much as a 1500 with the 4l60e. You can get a programmer that will among other things allow you to have torque management reduced or eliminated all together. I have a Superchips that seems to do the job for me but there are lots others including the popular tuned PCMs by Westers, Nelsons or PCMforless to name 3 and several handheld tuners by Superchips,HPP3 and Diablo Sport that may also do the trick. Check before you buy!

You may be crazy but I doubt that you are going nuts.