Anti-Lock Brake Problem
 

The other day, my anti-lock light came on and I have no idea why. The brakes feel fine. Anyone have this happen or know anything about it? Its a stock 87 with the 4+3.

Could be one of the following: abs computer, wheel sensor, abs relays, wiring problem, low fluid, etc. ABS parts are fun to track down. IF you can find an old tech with an ABS diagnostic tool - you're golden. Helms manual and or supplemental ABS troubleshooter guide will help

Call all the local Chevy dealers and see if they still have a C4 ABS tester, it will find the reason your abs light is on!

I had the same problem in the past. I added some brake fluid and the problem gone...
-Beppe-

http://members.shaw.ca/dankai/ABS%20Electrical.pdf
http://members.shaw.ca/dankai/ABS.pdf

Anti Lock Brake
 

My left rear wheel sensor was damaged when the rear wheel bearing went bad. I replaced the sensor and the system was back up. My sensor had worn through on the end. It was obvious when I compared it to a good sensor.

Larry

ack, dealers want coin. the break out boxes you need to test the pre 1990 abs systems are on ebay for $50-100 frequently. one of many reasons can cause this to come on. sensors and failed ebcms are the most common reasons. if you have a dead abs pump do let me know as i have a working spare in my garage.