2008 GMC Topkick C4500 8.1L When replacing the PCM for the tuned one will the passlock and crank position relearn be necessary. If it helps the key for ignition is common key. I bought a blank online and had the key cut locally as they didnt have blanks. No relarn then. Based on pictures it looks like Passlock. ( mike, 03/30/2019 )
The only vehicles we usually have to do a passkey and crankshaft relearn procedure on are light duty vehicles. The medium duty Kodiaks and Workhorse chassis don't need it.
Do you need to have the Allison for this?
I have a 04' (03 built) P-32 with the GM4 trans.
( Kevin J Parker, 02/18/2019 )
Yes we do, we custom tune the ECM on Workhorse chassis with both the Allison transmission as well as the 4L80/4L85E transmission.
Hello, I'm doing an 8.1 vortec swap that will be mated to a TH400. Donor truck is an 2001 K2500 Suburban. I want to lose the VATS and keep the emissions.

Is it possible to program for manual transmission and still keep the original Cal ID?
( Dan Green, 02/13/2019 )
Yes, this is possible.
How much change (if any) do you make to torque management with this eco tune?
Thanks
( Kevin, 02/11/2019 )
On trucks and SUV's we generally remove torque management in normal (not tow/haul) mode unless otherwise requested.
What is the turn around time on doing ecm and tcm. ( Charles McKnight, 01/18/2019 )
Typically 1-2 business days.