Mail Order Tuning


The mail order tuning process begins by Nelson Performance flashing a pcm with your vin and GM’s latest calibration. Nelson Performance does not offer canned tuning or handheld tuners. Each of our pcms are custom tuned based on your modifications, driving style, and octane level.  We then send it out and you simply return your pcm core within 20 days to avoid being charged additional fees. This ensures that you do not have any down time!

STOCK/BASIC BOLT ONS (ex. CAI, Exhaust, Headers, Tires, and Gears)
     $300.00 98-2008 (4 speed transmission only) Trucks/F-Body

MODIFIED (ex. Camshaft, Head, Intake Manifold Modification)
     $400.00 98-2008 Trucks/F-Body

HEAVILY MODIFIED (ex. Fully built engine, Supercharger, Turbo, Nitrous)
     $500.00 98-2008 (4 speed transmission only) Trucks/F-Body

*Nelson Performance no longer offers retunes or new tunes for 1996-1997 vehicles.

ECM Cores

The customer’s credit card is kept on file until the core is received within the 20 days given. In the event Nelson Performance does not receive the core(s) within 20 days the core charge will apply.  In order for the core return credit to be given, the customer must return a core with the same year service number, undamaged, unlocked, and usable. No refunds will be given on cores once credit card is charged.

The core fees are as follows:
      $75 .00 96-07 Old & Classic Body Style Vehicle
     $250.00 07-present New Body Style Vehicles (vehicles with separate ECM & TCM)

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