C4 Corvette PCM Programmer - Getting with the Program. ... Fortunately for your tool-averse narrator, "installing" the Hypertech Power Programmer III couldn't have been easier.

DiabloSport’s PCM and Trinity tuner added 13 hp to a baseline 2015 Dodge Challenger Scat Pack 392 and 26 hp when combined with TTi long-tube headers.

If your GM car/truck is a '96-and-later, it incorporates an OBD-II-based PCM, which controls the transmission as well. For engine control, the PCM takes many sensor inputs (O2, TPS, RPM, MAF, MAP ...