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Hi!
Thank you for the reply, please see the reply to Ben Charles below :)

Hi!
Thank you for the reply.
Attached is the tune we were provided by PSI after contacting them for troubleshooting, but this tune ran identical to what we already had on the box from when we...

Hi!

I am writing this post on behalf of my dad.
He has a old GMC Pickup that was restomodded back in 2016 using a 6.2 LS3 from a manual 2012 Camaro SS, and a wire harness + ECM / TCM / O2 sensors...