Computer problem
1988 Buick Lesabre 6 cyl Front Wheel Drive Automatic 186000 miles
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I had my car checked at aotuzone on their computer and the code came up 26,27,28,29 Quad driver module circuit. Can you tell me what this means.

A quad driver is a part of the engine module that controls 4 circuits. You would have to find a chart that shows you what is controlled by the driver. One of the solenoids on that circuit is probably either shorted or has an open circuit. There are a couple of solenoids in the transmission that could cause the code to set.