Just installed dual exhaust '99 GM. Will resetting the computer "ecm" cause all memories to be reset?

ie..

user code
door locks in drive
etc etc?

Thanks guys... Did the search, tried to claw the info out of the archives. no avail


Doug k
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2005 MGM.

"the more they tinker with the plumbing, the easier it is to stop up the pipes" Montgomery Scott