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Home >> GMC >> 1998 >> Forward Control 7.4 J >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls - Remove/Install/Overhaul - 5.7L) >> Computerized Engine Controls >> Powertrain Control Module (Pcm) >> Removal
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Powertrain Control Module (Pcm): Removal

WARNING: This page is about a different variant/trim than selected.

Ensure ignition switch is in OFF position. Disconnect negative battery cable. Unplug harness connectors from PCM. Remove PCM from vehicle. Remove access cover and remove knock sensor module from PCM.

NOTE: After installation of a NEW PCM, Malfunction Indicator Light (MIL) will remain on until PCM is programmed.