Where can I or can i get a 03 Peterbilt 379 ,C15 13 speed rewired completely to firewall including computer box.
Is it possible just to pay and have it done.
And where I'm in Utah will take truck to where it needs to go..
Any competent shop should be able to do it but be prepared as its not going to be cheap. You might want to see if anyone makes a replacement harness for that unit as it will offset the labor in the end.
Its honestly not that difficult as you just duplicate everything thats there but it takes mucho time to remove, clean, isolate etc individual wire then replace, reposition, reloom and so on.
Sorry cannot help with a shop but if there are any race car guys around your place talk to them as they should know possibly someone.