The oil filter was not the only engine issue:
Quote:
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GM acknowledged that the engine manufacturing plant had experienced some difficulty ridding the inside of the block of machining burrs. As luck would have it, its oil-filter manufacturer had a similar problem; some filters had a thread shard that could come loose and contaminate the lubrication system.
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The tranny's issues don't seem directly related to the engine - it simply can't cope with cold weather (and having a 7th gear was a big mistake too from all accounts). And the starter motor burned out as it was taking 12 seconds to start the car in the cold - did GM do any cold weather testing on this thing?