2001-2010 Duramax DSP5 Tune Update For Existing Customers Only

Regular price $150.00

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Update your existing DSP5 tune files for any changes that you have made to your truck since it was last tuned. (NOTE) that LB7 & LLY models can also utilize a CTS Monitor to switch tunes on the fly, to update your tune files it Requires either a Flashscan or Autocal device for Re-Flashing.

THIS UPDATE IS FOR EXISTING CUSTOMERS ONLY.