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2007 Chevy Suburban

-Came into shop for an engine due to low oil pressure, customer supplied gm crate motor that did not include oil level sensor, installed engine and changed dtc reports on oil...

-Following seem to have same issue with my 4.8l swap. basically a stock tune with vats gone and some minor adjustments to trans and startup flare. Runs great until 210 then it acts like it retards...