Bruce Nunnally Posted March 25, 2010 Report Share Posted March 25, 2010 GM has taken a fairly agressive stance on engine modifications:DocumentID: 2365177 #09-06-04-026A: Identifying Non-GM (Aftermarket) Engine and Transmission Calibrations for V8 GasEngines – (Oct 28, 2009)General Motors is identifying an increasing number of engine, transmission and catalytic converter part failures that are the result of non-GM (aftermarket) engine and transmission control calibrations being used.When alteration [...] View the full Blog Post Quote Bruce 2016 Cadillac ATS-V gray/black Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
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