If using our 996/997->GM E38 Plug N’ Play Engine Harness the GM E38 PCM (Powertrain Control Module) is a necessity being the engine management system for such! All E38’s sold by us undergo a basic re-conditioning and in turn certification process which includes a 90 day warranty; should you have any issues it’s as simple as sending yours out for replacement!
NOTE: IF an issue w/ your PCM should occur and you did not have us load a start-up tune on such we are not responsible for HP Tuner credit reimbursement.