I just purchased your UltraPower GM / Workhorse 1998-2000 7.4L Vortec (454) Custom Tuning.

Just to clarify…… I am assuming that I have purchased a new pre-programmed ECM correct?

And I know that I have provided my Vin but I wanted to make sure that this will come absolutely ready to plug and play for my 2000 GMC C6500 Topkick 7.4L V8.
( Justin, 04/30/2022 )

Your vehicle is not compatible. The 8th digit of your VIN is the letter "D" which designates your engine as a 7.4L LP4 which is different from a normal L29 7.4L.

1992 C2500 2dr 2wd with 7.4

If this were tuned by you, once installed, would there need to be any other modifications like air intake, exhaust, or radiator changes?

Thank you ( Shawn, 04/23/2022 )

I'm sorry, we can't tune anything prior to 1996 model year.

Is my only option to send in my ecm? ( Andrew S Evans, 02/09/2022 )

We are currently waiting on more ECM's to come in to be able to provide them on exchange.

I've made several performance upgrades myself, but are always looking for something better. I've installed hypertech power programmer, lower thermostat, gale banks torque tube headers and full exhaust, with hi-flow catalytic converters, shift-kit for tranny and larger external cooler. K&N fuel injection performance kit. This 1-ton dually truck is used for hauling a large slide in camper and atv trailer. I've noticed a significant performance uptick, but it seems to fall flat in the upper mid-range, almost seems like it could use a MSD multi spark discharge, I don't know, but I'm considering having a dyno test to see what is happening. oh, by the way, this is a low mileage engine, single owner and I have taken excellent care of this truck. do you think I could get more power with your ecm re-program? ( Mark Smith, 01/05/2022 )

From my experience, the HyperTech programmer for those engines is pretty generic and does not make very many changes in the programming. I am certain we can get more power and overall better drivability with our tuning versus your current setup.

Is the pcm that is used a 411? Can I tune it myself later with my own tuner or is it still a black box like the oem? ( Darcy Yakoweshen, 12/15/2021 )

We use the original black box PCM's. If you had the proper tuning software, you could tune it yourself later.