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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 358 (Automatic Transmission - 6T50 (M2D) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0634: Control Module Overtemperature >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

During a road test, the TCM temperature should steadily increase to a normal operating temperature, and then stabilize.

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