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Did you try boost vacuum in pressures?
If not it maybe that u need to use same Tmap that gm uses but tuner will need to adjust to it.
If that doesn't work you need to buy the mechanical vacuum to digital input they sale.
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Kong Ported 2650, Crawford Racing Port Injection, Weapon X 112mm Adapter, NW112mm TB, Livernois Ported LT4 Heads, Lingenfelter GT32 stealth cam, Haltech Elite, and Carbon by Trufiber |