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Home >> Chevrolet >> 1990 >> Step Van 7.4 N, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (Anti-Lock Brake System - 4-Wheel) >> Removal & Installation >> Electro-Hydraulic Control Unit (EHCU) >> Removal (Astro & Safari)

Removal (Astro & Safari)

WARNING: This page does not describe the selected car, but rather 58 other vehicles, including the 1992 Oldsmobile Bravada, 1992 GMC Yukon, 1992 GMC Suburban, 1992 GMC Sonoma, and 1992 GMC Safari. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Bleed vacuum and hydraulic pressure from system by depressing brake pedal several times. Position front wheels straight ahead. Index upper and lower "U" joints on intermediate steering shaft. Remove pinch bolt from upper and lower "U" joint. Index steering gear position. Remove steering gear mounting bolts. DO NOT disconnect pitman arm from pitman shaft. Separate steering gear from frame rail.
  2. Remove intermediate steering shaft. Disconnect hydraulic lines from bottom of combination valve. Disconnect electrical connector from combination valve. Remove master cylinder mounting bolts. Remove master cylinder and combination valve as an assembly.
  3. Disconnect hydraulic lines from EHCU. Disconnect electrical connectors from EHCU. Remove EHCU bracket-to-body bolts and nuts. Remove EHCU and bracket from vehicle as an assembly. Remove bracket from EHCU.
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