2000 Malibu & Avital 4200 remote start

four flashes means you went into timer mode.  that means you are pressing the lock and unlock button at the same time like the old avital remotes.  one the new 4000,4200, and 4300 you have to press the * twice.  thats in the owners book.

sorry if you were hitting the * twice tho.

on DEI stuff, i cap off the green wire that acts as the keyside starter wire.  it causes too many problems with ignorant customers.  they will lock with the remote and that activates the starter kill (anit grind)  then they call in and say it wont start with the key, and when they remote start and drive the lights blink.  THATS CAUSE IT THINKS ITS STOLEN.  lock and unlock with the remote ALWAYS.  anyway, just use the purple with it.  the oranges are just accy wires, they might connect to the same terminal else where in the car so they might test identical with your DMM.  you do need a second ign to power up.  besides that... are you on tach or voltage, is the over ride switch on, and did you happen to install the 555L passlock II bypass?

sorry, just read the rest of your post.  the remote start activation input isnt needed.  that is used for alarms to trigger the RS, so you can add eiter one later and stil have everything work.  you dont need the ignition output to alarm either.

as for the 451m, you dont have to use the whole thing unless you have a 5wi system.  the malibu is + trigger, lt. blue and white in the drivers kick.  take the ribbion harness from the 451m, and cut it off a few inches from the 451m.  take the red wire in the middle and strip it down to the white harnss, then cap it off or rip it out.  use the blue and green wires as your lock/unlock.  they change functions on + or - systems.  if you hook them up and lock really unlocks, just switch the blue and green wires.

I connected a wire to tach.  I do have the override switch on.  I did not install the 555L passlock II bypass.  I do not believe this car has passlock on it.  As far as the second ignitioin, I am still a little confused.  Is this the same wire I connected for the starter wire coming off the ignition?  If so, great, I got it.  If not, which wire do I connect it to.  Thanks for the advise on the green wire, I know this person would have problems with that.