TowRig.com - Diesel Discussion and Tow Tech

I think the '95 has RWAL. The BRAKE and ABS lights are on. I don't care except there's no reminder light if you leave the park brake on since it's already on.

The other day the vacuum line to the HVAC broke, and after I fixed it, the ABS and BRAKE lights were off. Later they came back on. Dunno if it's related. One of the vacuum lines goes to a little box with 3 wires on the driver fender. Anyone know what it is and if it might be related?

Also, previous owner installed bigger Chevy wheel cylinders. Wonder if that ticked off the ABS. Or the 37" tires...

Well, I know this topic is over a month old, but yes.... the '95 does have RAWL brakes. I don't think the larger tires or bigger wheel cylinders have anything to do with your problem. There are a lot of discussions about the ABS/Brake light on various forums. I know there is a sensor on the rear diff that can be a problem area; however, it didn't fix the problem for me on my '95. I haven't pursued the problem like I should because the light comes and goes. I do feel the problem is a vacuum problem.