One problem related to brake antilock wheel speed sensor has been reported for the 1998 Chevrolet Astro. The most recently reported issues are listed below.
While braking at low speed the abs would cause extended stopping distance. Dealership was notified, but did not resolve the problem. Front wheel speed sensor replaced. Left front window hangs when going up. Window tracke lubed. Pads and rotors replaced. Rer brake adjusted. Brake pedal kicked up when almost to a stop. Replaced brake calipers/rotors/ backing plates and removed sensors and cleaned rust build up on sensor and hub assemblies. Both idler amrs and front and rear shocks were replaced due to front end play.