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Home >> Chevrolet >> 1994 >> Astro Van Cargo Extended, 4.3 Z >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Powertrain Control Module (Pcm) >> Control Unit >> Removal

Control Unit: Removal

Disconnect negative battery cable. Unplug connectors from PCM. See Figure. Remove PCM from vehicle. Remove PROM and CALPAC (if equipped) or MEM-CAL from PCM. See CALPAC, MEM-CAL, or PROGRAMMABLE READ-ONLY MEMORY (PROM).