SPONSORED LINKS

2003 GMC Sonoma Brakes

Tiny
LASURVIVOR47
  • MEMBER
  • 2003 GMC SONOMA
  • 4.3L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 125,000 MILES
Engine off brakes firm. Engine on pedal travels to the floor. I know I have a vacuum leak. OBD2 tested. Thinking it's maybe the booster. Replaced lines from the MC to the ABS pump. Bled system with hand pump. No air in system, and no leaks. Again firm pedal with the engine off, and pedal travels to the floor with the engine on. I let the engine warm up also. Thanks!
SPONSORED LINKS
Wednesday, January 8th, 2014 AT 8:05 PM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Have a pro use a scanner to bleed your brakes, it may be air in the abs unit and he can make valves in abs openwhile bleeding, it can take up to 3 qts to get air out of system especially since you have replaced a couple of lines.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
+1
Thursday, January 9th, 2014 AT 6:55 AM
Tiny
LASURVIVOR47
  • MEMBER
  • 45 POSTS
Thanks for getting back to me. I will take it to the garage.
Was this
answer
helpful?
Yes
No
Thursday, January 9th, 2014 AT 10:56 AM

Please login or register to post a reply.

Related Booster Content

VIEW MORE

Sponsored links