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Re: 1999 GMC Sonoma pedal fade
Posted to Educators Forum on 3/16/2009

Bill,

Now that I know this is RWAL, it is REALLY easy to test. Go to the RWAL hydraulic valve and on the end with the accumulator you will find a vent hole. Take a straightened out paper clip and stick in the hole until it bottoms out. It will now be resting... Login to read more.