Having problems with your 1997 GMC Yukon ?

Brake pedal goes to floor by itself when truck is started and brakes are locked

Posted / edited by AnonymousUser on : 14-10-2019

Answers :

The vacuum booster for the master cylinder should be looked at. ive done this for over 20 years and i cant say ive ever heard of this. does this occur ONLY when the truck is started? do you have a pedal when the truck is off? please respond.
Repair Help & Product Troubleshooting for 1997 GMC Yukon

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