91 2500 Pulling to the left bad when braking

[BoxMasters]

Hey guys,
My 1991 Suburban 454 2500 suddenly started pulling to the left when I step on the brake. It started suddenly two days ago. I pulled off both front tires and inspected the brakes and rotors, both sides look fine.
I bleed the front system and refilled with fluid with finding any air in the lines and no fluid is leaking any where.

I'm thinking one side is not working at all when I step on the brake pedal.

It pulls very badly to the left when braking, does that mean the left or drivers side is not braking at all and only the passenger side is working.

Help................ he last brake job I did was on an old car with brake shoes in front and the wheel cylinder was leaking and I replace it.

This 3/4 ton has front disk and has a monster size caliper system. I can repair it myself with a little help from the Pro's here.

Thanks


Help.....................................

[Noell21]

Hi
I have an 82 Suburban (spare) that also pulls left when I brake but, if I hold the brakes on and straighten the wheel, I can let go of the wheel and it will stay straight as long as I keep the brakes on. When I let off the brakes it pulls to the right.
I've concluded that I have a hanging right caliper and so the left caliper grabs first when braking and it pulls left. The right caliper doesn't let go instantly when I release the brakes and it pulls right. (This is on my list of to-do's.)
You may want to see if yours does the same.
Regards, Noell21

[Old Dave]

Check the flexible brake lines that go to the calipers. They are prone to collapsing between the rubber and the steel clamp that attaches to the upper A-arm. The steel clamp rusts and eventually will pinch off the rubber line. I had to replace them on both my 86 C-10 and my 86 Suburban. I found this after I had replaced the caliper on one side and it didn't fix the problem. I think they were about $26 each and they are different depending on which side you need.

[BoxMasters]

Hi,

I blead the front brakes on both sides until new fluid replaced the old. The fluid ran easy during with my wife pumping and hold the brake pedal down to the floor.

If I had a bad flexible line would the fluid flow that easy?
When I jacked up each side I spun each wheel and had her step on the brakes, and each wheel stopped quickly with out hessitation.

After I blead the front brakes the second time the pull to the left was NOT as bad, but it still pulled some. Not as bad as before but it still pulled to the left.

Thanks for all answers and help

[2000CAYukon]

Originally Posted by BoxMasters

Hi,

I blead the front brakes on both sides until new fluid replaced the old. The fluid ran easy during with my wife pumping and hold the brake pedal down to the floor.

If I had a bad flexible line would the fluid flow that easy?
When I jacked up each side I spun each wheel and had her step on the brakes, and each wheel stopped quickly with out hessitation.

After I blead the front brakes the second time the pull to the left was NOT as bad, but it still pulled some. Not as bad as before but it still pulled to the left.

Thanks for all answers and help

When the rubber goes bad on the inside, it can actually INCREASE the pressure on one side causing a pull. The pressure bleeding the brakes and stopping the truck are very different.

If you have a garden hose running and then put your thumb over the end, what happens? The pressure increases and you can spray the water across your lawn. Same thing happens inside the brake hose, except the extra pressure causes the brake pull.

//2000CAYukon

[bad68chev]

Have you checked your control arm bushings? If they are worn can cause the control arm to move causing alignment to change while braking making vehicle pull.