1997 C1500 Brakes issues- Help appreciated!

[702_silverado]

I didn't catch whether it was only the back locking or the next wheel meant a front brake as well.

Yes the front has locked as well, its started with the rear. Every time a wheel locked I changed the caliper/cylinder.

 

[deadbeat]

Ok, then I agree with the advise they are giving you. When your brakes lock, you need to crack open one of the brake lines on the master cylinder. If this does not free the wheel, try one on the outgoing side of the abs box. If this frees the wheel it is the abs box, if the first does does it is likely the master cylinder.

 

[702_silverado]

Ok, then I agree with the advise they are giving you. When your brakes lock, you need to crack open one of the brake lines on the master cylinder. If this does not free the wheel, try one on the outgoing side of the abs box. If this frees the wheel it is the abs box, if the first does does it is likely the master cylinder.

Thank you for clarifying, I wasn't sure what exactly to do. I assume I open a line to the axle locked? Thanks again

 

[deadbeat]

Don't do that first, you know it is something upstream since it is affecting all 4 wheels. Start at the Master Cylinder, crack each line. If that doesn't work crack the outgoing lines from the ABS, one at a time and see if either of them helps. It should be one of the two things holding pressure.

 

[702_silverado]

UPDATE: I had to replaced to ABS pump. It was fouled by old brake fluid. Replaced with pump order from a yard in Florida, flushed brake fluid system and it works great now.