ID Speed Shop Single Custom Tune, Silverado 1500 5.3L (tuner/device sold separately)

A custom tune file written for a 2019-2023 5.3L Silverado and delivered as a file, not as hardware. ID Speed Shop adjusts air/fuel ratio, ignition timing and cam timing, and you choose a Street, Sport, Performance or Towing calibration.

why this one — The choice of four calibrations is the reason to pick this one, since you can order it biased toward towing instead of taking a single all purpose file. It costs more than the 5 Star tune and still needs a DiabloSport or HP Tuners device you already own. This part number is Silverado only, so Sierra owners have to order ID Speed Shop's separate Sierra version.