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We have been doing custom performance tuning for most GM cars and light trucks since 1995 and covers most 1994 to present model years. We tune for best performance, compliance to smog testing, for street or track from NA to boosted engines. We can do the tuning via emails if owner has a PCM/ECM flash tool or mailing us the PCM If older OBD-I then mailing us the Memcal so we can modify it and burn a custom tune into a new E-prom. If with driving distance tunes can be done here. We also tune the automatic transmission and fit custom tunes to the mods installed such as CAMs, headers, custom heads, supercharged, turbos and even N20.