One problem related to brake antilock control unit/module has been reported for the 1997 Buick Lesabre. The most recently reported issues are listed below.
I have discovered a brake fluid leak from the abs modulator assembly in my 1997 Buick Lesabre. There is a recall (#00v114000) for this very same problem in 2000 Lesabres. This can cause the braking system to malfunction! the recall should be extended to cover earlier years. In the mean time I am going to purchase a new abs modulator assembly. I fear the new valve assembly will develop the same problem.