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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 30 (AUTOMATIC TRANSMISSION - ALLISON - DIAGNOSTICS (DTCs P0218-P0731)) >> DTC P0634 >> Circuit Description

Circuit Description

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The transmission control module (TCM) is equipped with an internal temperature sensor mounted directly to the TCM circuit board. The TCM will take action to protect against damage from overheating.

DTC P0634 is a type B DTC.

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