i have a soft brake pedal and i have replaced lines,master cylinder,booster and wheel cylinder.
Aug 30, 2016 at 4:59 AM
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JIS001
✓Experienced Mechanic
3,412 POSTS
If you have ABS then you need an advance scanner to bleed air out the ABS hydraulic pump. If you do not have access to a scanner then try to rent one from your parts store. You may need to take it in to a shop to have t hat procedure done?
Feb 22, 2021 at 9:29 AM
WRENCHTECH
✓Experienced Mechanic
20,760 POSTS
You have to understand that GM vehicle will always have a soft pedal when the engine is running but you will find that the vehicle stops well before applying that much pressure. You should have a high and hard pedal with the engine off.
If there is actually a problem stopping the car with a low pedal, then bleeding with a scan tool would be suggested.