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2006 Buick LaCrosse CXL with random stalling issue - this started around 67K miles, now just over 70K. The engine just quits - totally randomly. When this happens the interior - including all guages - behaves as if the key is turned to the off position. While coasting I am consistently able to shift into neutral and re-start, continue on as if nothing happened. Dealer could not re-produce problem and only charged $60 for the "diagnosis". After much research I have replaced several parts commonly known among mechanics to cause this problem. I have switched out fuses, replaced the crank shaft sensor and ignition control module, examined and tightened every connection I could find, grounded engine block directly to battery negative terminal. Thought I had the problem fixed with the direct ground as I had no stall for almost 2 weeks of regular driving. Then last night it happened again. We can't be repeat GM customers if GM kills us on the highway! Will try replacing the ignition switch (my original suspect) next.
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