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GM PCM's

are these units powered up all the time or only after the ignition is on?

Reply to
gimmpy
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All the time..

on the older models you took the fuse out to Kill the codes

gimmpy wrote:

Reply to
no one

Nope.

A keep alive memory has nothing to with whether a PCM stays powered up with the ignition switched off.

Reply to
aarcuda69062

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