I have a 2007 impala 3.9. I recently put in a new master cylinder due to pedal going to the floor. I bench bled the master and then proceeded to go through the proper brake bleeding procedure with the scan tool. After bleeding brakes I have a brake pedal, then when I start the car the pedal goes away and the pedal loses all pressure. not sure if i need a new ABS module or what to try next. any help would be much appreciated. thanks in advance

 

Start your engine, but keep it in Park with the parking brake on. (If your vehicle doesn’t have power brakes, it’s okay to do this check with the engine off.)

 

ok and what is this going to accomplish?

 

You should have an abs light if you have an abs issue.

 

Probably brake fluid leaking

 

thats what i figured, ive done all the processes right and still i am losing the pedal after bleeding. i had a broken line and replaced it. and i cant see fluid leaking anywhere else