Yep, the norm when buying used with mileage + years = $$$$, generally buying used is buying someone's else's problems, you will be spending $$$$ in Injections component's and electronics , not to mention no help on the Tune BC you don't have the H&S module.
Yep, OP just ask something like this, Bought used form Texas and nothing but problems , I will be considerably more careful in the future. That's the 1st problem you bought a deleted truck W/O the H&S module, If the seller could NOT produce this device You should have consider it salvaged.