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your anti theft device is activated,you need to lock and unlock your doors a couple times with the key fob,not the key,and then you need to put the key in the ignition and start it,if you dont have your key fob,call your buick dealer to get a new one,they are programmed for each car only,you cannot bypass it.
Might be the anti theft turning your starter off. Read this link and compare your symptoms to the ones listed. http://vatspasslockpasskeysecurityhelp.yolasite.com/
I have had this issue 2 times, both times it was the battery having damaged/dead cells. You can sometimes get it to start by putting your foot on the break, turning the key to the on position, putting the car in neutral then starting it. I purchased my Commander new in 2006 and have had to replace the battery 2 times since, both times this was the initial symptom. I have 120K miles and still love my Commander
If the battery is fully charged and you have good connetions, sounds like an ignition timing problem. If the timing is too advanced, teh plugs will fire before the piston is high enough in the travel and when it fires will try to turn the engine over backwards. Check to be sure the firing order is correct and you didn't mix up any plug wires since having some firing at the wrong time will do the same thing. Stock engines will have the firing order cast into the intake manifold for easy reference.
ya hi there do you know motor size and year ? can you locate the ignition coil ? if so check to see 12 volts is present when you turn ignition to start position? check all fuses and also check relay's take each relay out and wiggle back in might be a bad connection .
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