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Home >> Pontiac >> 1991 >> Grand AM L4-138 2.3L DOHC QUAD 4 >> Repair and Diagnosis >> Powertrain Management >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Locations >> Quad Driver Module

Quad Driver Module

The Quad Driver Modules (QDM's) are hard wired inside the ECM.

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