Brake pedal goes almost to the floor in normal braking

2000 GMC SIERRA
276,000 MILES • 4.8L • V8 • 4WD • AUTOMATIC
Avatar
BOBSONLY
  • MEMBER
  • 3 POSTS
Replaced all brake components including the master cylinder and bled all M/C and brakes. Brake pedal goes almost to the floor in normal braking, but when doing a panic stop the pedal goes to the floor and total braking power is not achieved. Don't know if it's the Brake Pressure Modulator Valve or the Electronic Brake control Module, and no warning indicators light up on the dash.
Apr 19, 2017 at 1:20 AM
Avatar
HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
we see this a lot and you can try using a power bleeder to fix it and if that doesn't then a mechanic will have to use a scanner to open all valves on abs unit to bleed system and that normally takes care of it.
Apr 14, 2021 at 6:36 AM
Avatar
BOBSONLY
  • MEMBER
  • 3 POSTS
Thank you for your reply. This I will take care of through a dealership as there are only two mechanics shop in town and they don't have scanners or power bleeders available. Thank you again.
Apr 14, 2021 at 6:36 AM
Avatar
HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
rent it shops normally carry those
Apr 14, 2021 at 6:36 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle