Performance & Tuning

Tuning: What It Can and Cannot Do

Written by the PickupChain team · Last reviewed October 17, 2026

A handheld programmer or tuner changes engine and transmission settings: fuel, timing, shift points and, on turbo engines, boost. On turbocharged trucks the gains can be significant. Tuners also recalibrate the speedometer after a tire size change and can adjust idle and shift firmness.

Throttle controllers only change how quickly the pedal responds. The truck feels faster, but engine output does not change. They are a simple, reversible plug-in option.

Tuning can affect your powertrain warranty and emissions compliance. Look for tunes and parts that are legal in your state, especially in California and other CARB states, and save your stock file so you can return to factory settings.

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