1997 GMC Suburban brake bleeding problem

1997 GMC SUBURBAN
135,000 MILES • V8 • 2WD • AUTOMATIC
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DRXXX
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Replaced the pads on the front brakes no problems. Then removed most of the old fluid from reservoir and refilled, bled the right front and after a normal amount of air i got good clean fluid. the left front same except i keep getting air and quite a lot. I ran through a small bottle trying to get the air out no luck. I tried to get all the air out until I ran out of new fluid. Ii bought a big bottle and the next day started again with the RR then LR then FR all was normal but cannot get the air out of the left front. I do not see any leaks, it does have anti lock.
Jan 1, 2009 at 4:39 PM
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BUDDYCRAIGG
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what method of bleeding are you using?
Jan 1, 2009 at 7:42 PM
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DRXXX
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I'm using the two person method. I attach a tube to the bleeder and put it a bottle with a little fluid to keep air from going back up int the caliper. then my son pushes and holds while i crack open the valve- have no problem with the other three brakes just the left front
Thanks Paul
Jan 2, 2009 at 11:10 AM
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BUDDYCRAIGG
  • ✓ASE Certified Mechanic
  • 2,262 POSTS
  • ASE Certified Mechanic
if you haven't changed anything else in the brake system.
and it was ok before you replaced the pads.
i can only see options,

the seal in the caliper was damaged when the piston was pushed back in.
or
the sealing surface of of the bleed screw, or in the caliper is damaged.

try gravity bleeding that corner.
remove the bleed screw completely.
and just keep topping off the master cylinder.

after you stop getting bubbles, put the screw back in and then step on the pedal and hold it.

you are wanting to see if the pedal will go down and fluid will leak out of that caliper.
Jan 2, 2009 at 6:03 PM
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