Originally Posted by EagleMark Yup! Played with them a lot to prove the MPH Disable setting. Is yours an auto? If so then there might be some other settings involved causing DFCO to disengage early, like TCC. Mine is a T56 so DFCO is pretty straightforward to setup.
2001 Silverado 5.3L ECSB 2WD T56: T76 turbo, Meth injection, 72# injectors, 799 heads, 212/212 114LSA cam, Built 4L80E, 3.42's EFILive V1 Commercial, COS5 2-bar SOLSD, AEM wideband
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