E38 and E67 - GM Original Reprogramming

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Originally Posted by dc_justin

(broken retaining tab)

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I HATE when that happens! Got one of them here.

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Originally Posted by dc_justin

Tried flashing a '10 truck cal into a junk 455 ECM (broken retaining tab) and it took the calibration fine, EFILive couldn't retrieve the calibration though.

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That's the problem, it will take the calibration fine, it's what happens on the next power cycle that is bad.

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Originally Posted by dc_justin

It was a useless E38 to me as it was and had to test a theory. GM listed both the 5455 and the 3238 for that truck for some reason, depending on software version.

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Theory? :)