1993 Pontiac Bonneville • 6 cylinder 4WD Automatic • 100,000 miles

When I try to stop I ave to tap the brake twice. I tap the brake fr the first time it don't stop nor slow it downmy the second time it will work jus fine, soon as I tap the brake it starts to slow down why is that what should I have done? BTW its a 93 Bonnieville
January 25, 2011.

That is odd because the brakes work on hydraulic pressure. It should work the first time unless the master cylinder is bad. Have that checked.