RepairPal Certified shops can diagnose and repair your 1999 Buick LeSabre. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
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First you need to know the cause of horn staying on. Problem usally in steering column and if it has an air bag it can be in that unit. The air bag is the worst case since there is no repair for it ....just have to replace it.