7/16/2017 0 Comments Gm Ecm SoftwareSinister Performance, LLC. Custom ECM/PCM Tuning. Sinister Performance, LLC. We are dedicated to tuning your vehicle's engine computer to. ![]() Year Make Model ECU ECU Description GM Programmable Modules using J2534-1 or J2534-2 2008 Cadillac Herse / Limo TVT TV Tuner 2008 Cadillac Herse / Limo UPA Park. Sinister Performance, LLC. Custom Chip / ECM / PCM Reprogramming & Tuning. For most GM Cars and Trucks (EFI only & for off-road-use only applications). ![]()
The function. of the adapter is to bypass the factory PROM chip on your mem- cal and force the. ECM/PCM to instead read the custom programmed EPROM chip we will install onto. Use of this. device can save money and downtime when extensive tuning work is required. Other restrictions may apply to your specific. For our customers who have flash- programmable OBD1 ECMs/PCMs. OBD2 ECMs/PCMs - a PCM exchange program option might be available. A core charge or other. Limited availability.)No refunds after 6.
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