Low Brake Pedal - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-18-2013, 08:32 AM   #1
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Default Low Brake Pedal

99 Bonneville has issues with low brake pedal. Has since I bought the car with 40000 miles. It now has 64000 on it. Brake pedal is extremely close to floor and has slow reaction to pedal travel. Brake pads almost new. New rear wheel cylinders. New MC. System completely bled. Could this car have had the wrong booster from the get go. Have owned 2 other Bonnevilles, a 94 & 97, and the brake pedal feel was much better. I know all cars are different, but something is not right. Any ideas. Thanks
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Old 04-18-2013, 09:03 AM   #2
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Check for a vacuum leak at the booster. Are there any signs you have a vacuum leak anywhere, such as rough idle?
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Old 04-18-2013, 10:31 PM   #3
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I would check the adjustment of the rear brakes if there not adjusted enough it could cause the pedal to be low. Also i would try bleeding them again. There might have been air trapped in the abs when they where bleed.
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Old 04-19-2013, 10:00 AM   #4
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Pump the brake pedal several times and see if it comes up off the floor, or gets firmer. If it does that is a sure sign you still have air in the system and that you need to bleed it some more.
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