Get accessories for your programmer or tuner and add functionality to the OBDII port on your 2001-2004 Chevy/GMC 6.6L LB7 Duramax with the OBDII Splitters & Accessories available. Extension cables for tuners, programmers, or modules, along with OBDII covers, are available for a variety of applications. If you're looking to add extra electronic accessories that utilize the OBDII port on your vehicle an OBDII Splitter is the solution you need. Visit XDP and find OBDII Splitters & Accessories from manufacturers such as Bully Dog Technologies, Diablosport, SCT, and many more!